instead of ignoring testimagefilters EVERYWHERE, just ignore particular failures

expectations/gm/Test-Android-NexusS-SGX540-Arm7-Debug/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 6651 matching lines @@
           "bitmap-64bitMD5", 
           15197842121034928067
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "testimagefilters_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          4806854696235085637
+          14688683472045987229
         ]
       ], 
-      "ignore-failure": false
+      "bugs": [
+        2603
+      ], 
+      "ignore-failure": false, 
+      "reviewed-by-human": false
     }, 
     "texdata_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           8202463522803346863
         ]
       ], 
       "bugs": [
         1578
@@ skipping 606 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           12078165737327679843
         ]
       ], 
       "reviewed-by-human": true
     }
   }
 }