rebaseline pictureshader GM on GPU

expectations/gm/Test-Ubuntu12-ShuttleA-GTX660-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 14944 matching lines @@
           "bitmap-64bitMD5", 
           16716769611359572173
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "pictureshader_msaa16.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          9145862502009863105
+          18274605176124919546
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "pictureshader_nvprmsaa4.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          14686128772703870572
+          16716769611359572173
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "pictureshader_pdf-poppler.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           11025200251217190919
         ]
@@ skipping 4715 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           14883391086059083985
         ]
       ], 
       "reviewed-by-human": true
     }
   }
 }