Revert "Change  the timestamp of llvmcache-foo file to meet the thinLTO prune policy"

This reverts commit r345977.

A few bots failing because the invocation of "touch" is not accepted on
a couple other OSes. Specifically the -d argument is not accepted or requires
a different format.

http://lab.llvm.org:8011/builders/lld-x86_64-darwin13/builds/27103/steps/test_lld/logs/stdio
http://lab.llvm.org:8011/builders/lld-x86_64-freebsd/builds/24974/steps/test_lld/logs/stdio

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@345980 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/ELF/lto/cache.ll b/test/ELF/lto/cache.ll
index 63ab3f6..86fcf81 100644
--- a/test/ELF/lto/cache.ll
+++ b/test/ELF/lto/cache.ll
@@ -19,10 +19,6 @@
 ; RUN: ld.lld --thinlto-cache-dir=%t.cache --thinlto-cache-policy cache_size_bytes=128k:prune_interval=0s -o %t3 %t2.o %t.o
 ; RUN: ls %t.cache | count 5
 
-; Increase the age of llvmcache-foo, which will give it the oldest time stamp
-; so that it is processed and removed first.
-; RUN: touch -r %t.cache/llvmcache-foo -d '-2 minutes' %t.cache/llvmcache-foo
-
 ; This should remove it.
 ; RUN: ld.lld --thinlto-cache-dir=%t.cache --thinlto-cache-policy cache_size_bytes=32k:prune_interval=0s -o %t3 %t2.o %t.o
 ; RUN: ls %t.cache | count 4
diff --git a/test/wasm/lto/cache.ll b/test/wasm/lto/cache.ll
index 35b7c78..9b4aa5d 100644
--- a/test/wasm/lto/cache.ll
+++ b/test/wasm/lto/cache.ll
@@ -17,10 +17,6 @@
 ; RUN: wasm-ld --thinlto-cache-dir=%t.cache --thinlto-cache-policy cache_size_bytes=128k:prune_interval=0s -o %t.wasm %t2.o %t.o
 ; RUN: ls %t.cache | count 5
 
-; Increase the age of llvmcache-foo, which will give it the oldest time stamp
-; so that it is processed and removed first.
-; RUN: touch -r %t.cache/llvmcache-foo -d '-2 minutes' %t.cache/llvmcache-foo
-
 ; This should remove it.
 ; RUN: wasm-ld --thinlto-cache-dir=%t.cache --thinlto-cache-policy cache_size_bytes=32k:prune_interval=0s -o %t.wasm %t2.o %t.o
 ; RUN: ls %t.cache | count 4