Stop running pnacl glibc tests on toolchain bots.
Stop running pnacl glibc tests on toolchain bots.

Removing support for building against current glibc headers will simplify the pnacl ABI implementation in clang (support for regparm can be removed).

R=jvoung@chromium.org,eliben@chromium.org
BUG= https://code.google.com/p/nativeclient/issues/detail?id=2346
TEST=toolchain bots

Review URL: https://codereview.chromium.org/12659005

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11145 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client