Fix build break caused by my previous checkin.
Fix build break caused by my previous checkin.

The -stdlib hasn't made it through the toolchain either, not just libc++.

TBR= jvoung@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23619050

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@12157 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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