Fixes gyp bindings generator dependencies

BUG=none
TEST=none
R=darin@chromium.org, davemoore@chromium.org

Review URL: https://codereview.chromium.org/172433002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252103 0039d316-1c4b-4281-b951-d872f2087c98

mojo/public/bindings/mojom_bindings_generator.gypi

@@ -65,8 +65,8 @@
     }
   ],
   'dependencies': [
-    'mojo_bindings',
-    'mojo_system',
+    '<(DEPTH)/mojo/mojo.gyp:mojo_bindings',
+    '<(DEPTH)/mojo/mojo.gyp:mojo_system',
   ],
   'include_dirs': [
     '<(DEPTH)',