Rebaseline dashing3 GMs for r12357

expectations/gm/Test-Mac10.6-MacMini4.1-GeForce320M-x86_64-Release/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 4558 matching lines @@
           "bitmap-64bitMD5", 
           9992031980990536415
         ]
       ], 
       "ignore-failure": false
     }, 
     "dashing3_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          14979711276760319805
+          4966669430067892482
         ]
       ], 
       "ignore-failure": false
     }, 
     "dashing3_mesa.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           4109378280232462753
         ]
@@ skipping 8620 matching lines @@
           12811268225408794900
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }
   }
 }