gm/internal_links test: add kSkipPipe_Flag until we fix bug 1761

BUG=skia:1761
TBR=reed

Review URL: https://codereview.chromium.org/49693004

git-svn-id: http://skia.googlecode.com/svn/trunk@11987 2bbb7eff-a529-9590-31e7-b0007b416f81

gm/internal_links.cpp

@@ -50,6 +50,10 @@ protected:
         canvas->restore();
     }
 
+    virtual uint32_t onGetFlags() const {
+        return kSkipPipe_Flag;
+    }
+
 private:
     /** Draw an arbitrary rectangle at a given location and label it with some
      *  text. */