Add flag to skip pipe on select GMs

Confirmed with scroggo@ that these should not be run
with pipe.
Review URL: https://codereview.appspot.com/6405068

git-svn-id: http://skia.googlecode.com/svn/trunk@4698 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/bitmapcopy.cpp b/gm/bitmapcopy.cpp
index 4b73baf..6080918 100644
--- a/gm/bitmapcopy.cpp
+++ b/gm/bitmapcopy.cpp
@@ -111,7 +111,8 @@
         }
     }
 
-    virtual uint32_t onGetFlags() const { return kSkipPicture_Flag; }
+    virtual uint32_t onGetFlags() const { return kSkipPicture_Flag
+                                               | kSkipPipe_Flag; }
 
 private:
     typedef GM INHERITED;