we need for our own build system internally.
R=csilvers
DELTA=16 (13 added, 1 deleted, 2 changed)
Revision created by MOE tool push_codebase.
MOE_MIGRATION=1555
git-svn-id: https://snappy.googlecode.com/svn/trunk@30 03e5f5b5-db94-4691-08a0-1a8bf15f6143