Build biased bitcode properly for libc++
Build biased bitcode properly for libc++

R=dschuff@chromium.org
BUG= https://code.google.com/p/nativeclient/issues/detail?id=3623
TEST= ./pnacl/scripts/llvm-test.py --libcxx-tests

Review URL: https://codereview.chromium.org/83513003

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@12436 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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