Cleaning up some issues with cygwin horking tarball generation. Making bad return codes actually fail the build.
Cleaning up some issues with cygwin horking tarball generation.
Making bad return codes actually fail the build.

BUG=None
TEST=None
TBR=cbiffle

Review URL: http://codereview.chromium.org/525111

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@1268 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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