Add efffects to the list of dependencies for bench_pictures. Required on Android.

Review URL: http://codereview.appspot.com/6489078

git-svn-id: http://skia.googlecode.com/svn/trunk@5406 2bbb7eff-a529-9590-31e7-b0007b416f81

gyp/tools.gyp

@@ -92,6 +92,7 @@
       ],
       'dependencies': [
         'core.gyp:core',
+        'effects.gyp:effects',
         'ports.gyp:ports',
         'tools.gyp:picture_utils',
         'tools.gyp:picture_benchmark',