[libcxx] Use %{temp} instead of %T (#162323)

Based on review feedback in #160026.

This makes the substitution a lot more clear now that there is no
documentation around %T.

---------

Co-authored-by: Louis Dionne <ldionne.2@gmail.com>
GitOrigin-RevId: 0c2913afc82a683d82f16f09442d49b1fb25ca67
diff --git a/test/configs/apple-libc++abi-shared.cfg.in b/test/configs/apple-libc++abi-shared.cfg.in
index 537fe82..0da074b 100644
--- a/test/configs/apple-libc++abi-shared.cfg.in
+++ b/test/configs/apple-libc++abi-shared.cfg.in
@@ -36,7 +36,7 @@
     '-nostdlib++ -L %{lib} -lc++ %{apple-system-shims}'
 ))
 config.substitutions.append(('%{exec}',
-    '%{executor} --execdir %T --env DYLD_LIBRARY_PATH=%{lib} -- '
+    '%{executor} --execdir %{temp} --env DYLD_LIBRARY_PATH=%{lib} -- '
 ))
 
 config.stdlib = 'apple-libc++'
diff --git a/test/configs/apple-libc++abi-system.cfg.in b/test/configs/apple-libc++abi-system.cfg.in
index 1e80eee..0e62e03 100644
--- a/test/configs/apple-libc++abi-system.cfg.in
+++ b/test/configs/apple-libc++abi-system.cfg.in
@@ -20,7 +20,7 @@
     '-nostdlib++ -L %{lib} -lc++'
 ))
 config.substitutions.append(('%{exec}',
-    '%{executor} --execdir %T -- '
+    '%{executor} --execdir %{temp} -- '
 ))
 
 config.stdlib = 'apple-libc++'
diff --git a/test/configs/armv7m-picolibc-libc++abi.cfg.in b/test/configs/armv7m-picolibc-libc++abi.cfg.in
index 0594ba4..e61efbb 100644
--- a/test/configs/armv7m-picolibc-libc++abi.cfg.in
+++ b/test/configs/armv7m-picolibc-libc++abi.cfg.in
@@ -25,7 +25,7 @@
     ' --cpu cortex-m3')
 config.substitutions.append(('%{exec}',
     '%{executor}'
-    ' --execdir %T'
+    ' --execdir %{temp}'
 ))
 
 import os, site
diff --git a/test/configs/ibm-libc++abi-shared.cfg.in b/test/configs/ibm-libc++abi-shared.cfg.in
index bd6c1fb..238cfdb 100644
--- a/test/configs/ibm-libc++abi-shared.cfg.in
+++ b/test/configs/ibm-libc++abi-shared.cfg.in
@@ -19,7 +19,7 @@
     '-nostdlib++ -L %{lib} -lc++ -lc++abi -Wl,-bbigtoc'
 ))
 config.substitutions.append(('%{exec}',
-    '%{executor} --execdir %T --env LIBPATH=%{lib} -- '
+    '%{executor} --execdir %{temp} --env LIBPATH=%{lib} -- '
 ))
 
 import os, site
diff --git a/test/configs/llvm-libc++abi-android.cfg.in b/test/configs/llvm-libc++abi-android.cfg.in
index bc58446..e8bc3c9 100644
--- a/test/configs/llvm-libc++abi-android.cfg.in
+++ b/test/configs/llvm-libc++abi-android.cfg.in
@@ -29,7 +29,7 @@
 config.substitutions.append(('%{exec}',
     '%{executor}' +
     ' --job-limit-socket ' + libcxx.test.android.adb_job_limit_socket() +
-    ' --prepend-path-env LD_LIBRARY_PATH /data/local/tmp/libc++ --execdir %T -- '
+    ' --prepend-path-env LD_LIBRARY_PATH /data/local/tmp/libc++ --execdir %{temp} -- '
 ))
 
 libcxx.test.config.configure(
diff --git a/test/configs/llvm-libc++abi-merged.cfg.in b/test/configs/llvm-libc++abi-merged.cfg.in
index c6fa430..0aecc44 100644
--- a/test/configs/llvm-libc++abi-merged.cfg.in
+++ b/test/configs/llvm-libc++abi-merged.cfg.in
@@ -13,7 +13,7 @@
     '-nostdlib++ -L %{lib} -Wl,-rpath,%{lib} -lc++ -pthread'
 ))
 config.substitutions.append(('%{exec}',
-    '%{executor} --execdir %T -- '
+    '%{executor} --execdir %{temp} -- '
 ))
 
 import os, site
diff --git a/test/configs/llvm-libc++abi-mingw.cfg.in b/test/configs/llvm-libc++abi-mingw.cfg.in
index 0d8b7bd..14f7ab8 100644
--- a/test/configs/llvm-libc++abi-mingw.cfg.in
+++ b/test/configs/llvm-libc++abi-mingw.cfg.in
@@ -11,7 +11,7 @@
     '-nostdlib++ -L %{lib} -lc++'
 ))
 config.substitutions.append(('%{exec}',
-    '%{executor} --execdir %T --prepend_env PATH=%{install-prefix}/bin -- '
+    '%{executor} --execdir %{temp} --prepend_env PATH=%{install-prefix}/bin -- '
 ))
 
 import os, site
diff --git a/test/configs/llvm-libc++abi-shared-clangcl.cfg.in b/test/configs/llvm-libc++abi-shared-clangcl.cfg.in
index cfdfc0f..01cd2b2 100644
--- a/test/configs/llvm-libc++abi-shared-clangcl.cfg.in
+++ b/test/configs/llvm-libc++abi-shared-clangcl.cfg.in
@@ -11,7 +11,7 @@
     '-nostdlib -L %{lib} -lc++ -lc++abi -lmsvcrt -lmsvcprt -loldnames'
 ))
 config.substitutions.append(('%{exec}',
-    '%{executor} --execdir %T --prepend_env PATH=%{lib} -- '
+    '%{executor} --execdir %{temp} --prepend_env PATH=%{lib} -- '
 ))
 
 import os, site
diff --git a/test/configs/llvm-libc++abi-shared.cfg.in b/test/configs/llvm-libc++abi-shared.cfg.in
index 6b69205..e5f18d5 100644
--- a/test/configs/llvm-libc++abi-shared.cfg.in
+++ b/test/configs/llvm-libc++abi-shared.cfg.in
@@ -13,7 +13,7 @@
     '-nostdlib++ -L %{lib} -Wl,-rpath,%{lib} -lc++ -lc++abi -pthread'
 ))
 config.substitutions.append(('%{exec}',
-    '%{executor} --execdir %T -- '
+    '%{executor} --execdir %{temp} -- '
 ))
 
 import os, site
diff --git a/test/configs/llvm-libc++abi-static-clangcl.cfg.in b/test/configs/llvm-libc++abi-static-clangcl.cfg.in
index ba67c8b..9f48389 100644
--- a/test/configs/llvm-libc++abi-static-clangcl.cfg.in
+++ b/test/configs/llvm-libc++abi-static-clangcl.cfg.in
@@ -11,7 +11,7 @@
     '-nostdlib -L %{lib} -llibc++ -llibc++abi -lmsvcrt -lmsvcprt -loldnames'
 ))
 config.substitutions.append(('%{exec}',
-    '%{executor} --execdir %T --prepend_env PATH=%{lib} -- '
+    '%{executor} --execdir %{temp} --prepend_env PATH=%{lib} -- '
 ))
 
 import os, site
diff --git a/test/configs/llvm-libc++abi-static.cfg.in b/test/configs/llvm-libc++abi-static.cfg.in
index 352e2c3..3fca7b3 100644
--- a/test/configs/llvm-libc++abi-static.cfg.in
+++ b/test/configs/llvm-libc++abi-static.cfg.in
@@ -13,7 +13,7 @@
     '-nostdlib++ -L %{lib} -lc++ -lc++abi -pthread'
 ))
 config.substitutions.append(('%{exec}',
-    '%{executor} --execdir %T -- '
+    '%{executor} --execdir %{temp} -- '
 ))
 
 import os, site