Add special case circle blur for Ganesh

gm/blurcircles.cpp

Index: gm/blurcircles.cpp
diff --git a/gm/blurcircles.cpp b/gm/blurcircles.cpp
index e4f956fc43adb94b8a6b7f8f0c1d83c8e537836a..57a0e63fb412b37075471534897327ab6518fbd0 100644
--- a/gm/blurcircles.cpp
+++ b/gm/blurcircles.cpp
@@ -19,6 +19,7 @@ public:
     }
 
 protected:
+    bool runAsBench() const override { return true; }
 
     SkString onShortName() override {
         return fName;
@@ -48,6 +49,7 @@ protected:
 
                 canvas->drawCircle(SkIntToScalar(50),SkIntToScalar(50),SkIntToScalar(circleRadii[j]),paint);
                 canvas->translate(SkIntToScalar(150), 0);
+
             }
         }
     }