Rebaseline dashing3 GMs for r12357

expectations/gm/Test-Ubuntu12-ShuttleA-ATI5770-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 4150 matching lines @@
           "bitmap-64bitMD5", 
           2000525185460569669
         ]
       ], 
       "ignore-failure": false
     }, 
     "dashing3_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          77737295629083338
+          1947136696399656014
         ]
       ], 
       "ignore-failure": false
     }, 
     "dashing3_pdf-poppler.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           10475351773979495594
         ]
@@ skipping 7199 matching lines @@
           6390212674028962030
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }
   }
 }