cmake fix to make build compatible with Windows builds.
BUG=366
TESTED=untested
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/23879004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1112 16f28f9a-4ce2-e073-06de-1de4eb20be90
3 files changed