Added direct_dependent_settings to dl.gyp so other modules can use the Openmax interface.

R=andrew@webrtc.org, rtoy@google.com

Review URL: https://webrtc-codereview.appspot.com/2189005

git-svn-id: http://webrtc.googlecode.com/svn/deps/third_party/openmax@4797 4adac7df-926f-26a2-2b94-8c16560cd09d