Rebaseline for gpu dashing4 now doing circle dashes

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

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 5527 matching lines @@
           "bitmap-64bitMD5", 
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         ]
       ], 
       "reviewed-by-human": true
     }, 
     "dashing4_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          10916419994292168605
+          17509002517889485628
         ]
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       "reviewed-by-human": true
     }, 
     "dashing4_pdf-mac.png": {
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         [
           "bitmap-64bitMD5", 
           46692629670263992
         ]
@@ skipping 9644 matching lines @@
           7829854837061118142
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }
   }
 }