Also tinker with the deps a bit to allow for more parallelism during the build process.

TRAC #22437

Signed-off-by: Nicolas Capens
Signed-off-by: Daniel Koch
Author: Jamie Madill

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1754 736b8ea6-26fd-11df-bfd4-992fa37f6226