Mac: Fix inclusion of resource files in binary distributions.

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk/cef3@1200 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
Linux: Simplify gtk-related dependencies in cef.gyp.

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk/cef3@1206 5089003a-bbd8-11dd-ad1f-f1f9622dbc98