[Author: nigelchoi]
[Author: nigelchoi]

Fixed invocation of leaks by iPhone Simulator builds. Fail build jobs properly if leaks invocation failed. (http://code.google.com/p/google-toolbox-for-mac/issues/detail?id=56)

R=dmaclach,thomasvl
APPROVED=thomasvl

git-svn-id: 741c308154f1e22deafec9707230e8b816ec4ca6@384 7dc7ac4e-7543-0410-b95c-c1676fc8e2a3

chao787/GTM-mirror,chao787/GTM-mirror,chao787/GTM-mirror