rebaseline srcmode for gpus -- now pass samplecount

expectations/gm/Test-Ubuntu13.10-ShuttleA-NoGPU-x86_64-Debug/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 10797 matching lines @@
           "bitmap-64bitMD5", 
           12332625502817210303
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }
   }
-}
+}