rebaseline srcmode for gpus -- now pass samplecount

expectations/gm/Test-Android-Nexus7-Tegra3-Arm7-Release/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 8654 matching lines @@
     "xfermodes_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           4896933091710642125
         ]
       ], 
       "reviewed-by-human": true
     }
   }
-}
+}