add 90 degree test case to rects GM

gm/rects.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkTArray.h"
 #include "SkMatrix.h"
@@ skipping 141 matching lines @@
             m.setSkew(1.5f, 1.5f);
             fMatrices.push_back(m);
         }
 
         {
             // 30 degree rotation
             SkMatrix m;
             m.setRotate(SkIntToScalar(30));
             fMatrices.push_back(m);
         }
+
+        {
+            // 90 degree rotation
+            SkMatrix m;
+            m.setRotate(SkIntToScalar(90));
+            fMatrices.push_back(m);
+        }
     }
 
     void makeRects() {
         {
             // small square
             SkRect r = SkRect::MakeLTRB(0, 0, 30, 30);
             fRects.push_back(r);
         }
 
         {
@@ skipping 63 matching lines @@
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new RectsGM; }
 static GMRegistry reg(MyFactory);
 
 }