ignore some verylargebitmap errors

expectations/gm/Test-Win8-ShuttleA-HD7770-x86-Debug/expected-results.json

 {
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           12831071530564277917
         ]
       ], 
       "bugs": [
@@ skipping 12831 matching lines @@
       ], 
       "bugs": [
         1935
       ], 
       "reviewed-by-human": false
     }, 
     "verylargebitmap_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          10262256877703773151
+          6194629758544639580
         ]
       ], 
       "bugs": [
-        1935
+        1978
       ], 
+      "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "verylargebitmap_8888.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          10492157671811011535
+          17740365767012252887
         ]
       ], 
       "bugs": [
-        1935
+        1978
       ], 
+      "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "verylargebitmap_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           7010010038218638175
         ]
       ], 
       "bugs": [
@@ skipping 200 matching lines @@
           14019814087375927425
         ]
       ], 
       "bugs": [
         1935
       ], 
       "reviewed-by-human": false
     }
   }
 }