Rebase shadertext2,3 and stroketext on gpu configs

expectations/gm/Test-Mac10.8-MacMini4.1-GeForce320M-x86-Debug/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 13732 matching lines @@
           "bitmap-64bitMD5", 
           11534441024413989438
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "shadertext3_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          10172622735898760726
+          17949791672893137188
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "shadertext3_pdf-mac.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           10118550717950670217
         ]
@@ skipping 2531 matching lines @@
           7829854837061118142
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }
   }
 }