Make build script fail if some stubout is fail. BUG= TEST= Review URL: http://codereview.chromium.org/6410081
Make build script fail if some stubout is fail.
BUG=
TEST=
Review URL: http://codereview.chromium.org/6410081

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@4274 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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