Rebaseline for gpu dashing4 now doing circle dashes

expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Debug/expected-results.json

 {
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           12831071530564277917
         ]
       ], 
       "bugs": [
@@ skipping 7006 matching lines @@
           "bitmap-64bitMD5", 
           10873004693785991483
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "dashing4_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          4903737309685329914
+          1395267708058780826
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "dashing4_msaa16.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           14799529456522288961
         ]
@@ skipping 12793 matching lines @@
           14019814087375927425
         ]
       ], 
       "bugs": [
         1935
       ], 
       "reviewed-by-human": false
     }
   }
 }