Add expectations for dashing gm

expectations/gm/Test-Win7-ShuttleA-HD2000-x86-Debug-DirectWrite/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 4507 matching lines @@
         [
           "bitmap-64bitMD5", 
           10475351773979495594
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }, 
+    "dashing4_565.png": {
+      "allowed-digests": [
+        [
+          "bitmap-64bitMD5", 
+          8454109889032154845
+        ]
+      ], 
+      "reviewed-by-human": true
+    }, 
+    "dashing4_8888.png": {
+      "allowed-digests": [
+        [
+          "bitmap-64bitMD5", 
+          10326529307675497710
+        ]
+      ], 
+      "reviewed-by-human": true
+    }, 
+    "dashing4_gpu.png": {
+      "allowed-digests": [
+        [
+          "bitmap-64bitMD5", 
+          130107792326448839
+        ]
+      ], 
+      "reviewed-by-human": true
+    }, 
     "dashing_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           2587070015488181148
         ]
       ], 
       "bugs": [
         1578
       ], 
@@ skipping 8078 matching lines @@
           14157160633878011690
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }
   }
 }