crank up innerloop to make hairlinebench more usable/reliable

bench/HairlinePathBench.cpp

Index: bench/HairlinePathBench.cpp
diff --git a/bench/HairlinePathBench.cpp b/bench/HairlinePathBench.cpp
index 67f54767244ea7df3c4e0c53b5e620f4b129c8fe..e421ce07b19933668a7996603f782a0fcb475aff 100644
--- a/bench/HairlinePathBench.cpp
+++ b/bench/HairlinePathBench.cpp
@@ -64,7 +64,9 @@ protected:
         }
 
         for (int i = 0; i < loops; i++) {
-            canvas->drawPath(path, paint);
+            for (int j = 0; j < 100; ++j) {
+                canvas->drawPath(path, paint);
+            }
         }
     }