fix bench and gm targets on Linux
see http://codereview.appspot.com/4530104



git-svn-id: http://skia.googlecode.com/svn/trunk@1490 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gyp/utils.gyp b/gyp/utils.gyp
index bde4368..c0db053 100644
--- a/gyp/utils.gyp
+++ b/gyp/utils.gyp
@@ -111,6 +111,12 @@
           'sources!': [
             '../src/utils/SkEGLContext_none.cpp',
           ],
+          'link_settings': {
+            'libraries': [
+              '-lGL',
+              '-lGLU',
+            ],
+          },
         }],
         [ 'OS != "win"', {
           'sources!': [