Reserve a tag number.

llvm-svn: 110084
diff --git a/llvm-gcc-4.2/README b/llvm-gcc-4.2/README
new file mode 100644
index 0000000..9be18d3
--- /dev/null
+++ b/llvm-gcc-4.2/README
@@ -0,0 +1 @@
+This tag is reserved for Apple-internal changes relative to 2365.