New GPU baselines for colormatrix GM.

expectations/gm/Test-Win7-ShuttleA-HD2000-x86-Release/expected-results.json

 {
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           9785004568147979273
         ]
       ], 
       "bugs": [
@@ skipping 3529 matching lines @@
       ], 
       "bugs": [
         2146
       ], 
       "reviewed-by-human": false
     }, 
     "colormatrix_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          3803776117583071141
+          1290342250623999108
         ]
       ], 
       "bugs": [
         2146
       ], 
       "reviewed-by-human": false
     }, 
     "colormatrix_pdf-poppler.png": {
       "allowed-digests": [
         [
@@ skipping 9516 matching lines @@
           15843716056234692659
         ]
       ], 
       "bugs": [
         2146
       ], 
       "reviewed-by-human": false
     }
   }
 }