Remove workaround for LLVM code generation bug (the StackColoring bug)
Remove workaround for LLVM code generation bug (the StackColoring bug)

This bug has now been fixed upstream, and we've applied the fix to the PNaCl
toolchain.

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3374
TEST=run_mmap_prot_exec_test bitcode=1

Review URL: https://codereview.chromium.org/15766002

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11384 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client