Update nacl-glibc revision
Update nacl-glibc revision

This pulls in:
3f55ac5  Make static linking work on x86-64

BUG=http://code.google.com/p/nativeclient/issues/detail?id=940
TEST=trybots

Review URL: http://codereview.chromium.org/6169001

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@4086 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client