Some more medium/MIP downsample gpu rebaslines and misc gpu innocuous rebaselines

expectations/gm/Test-Android-Nexus10-MaliT604-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 7071 matching lines @@
           "bitmap-64bitMD5", 
           14419229469100975106
         ]
       ], 
       "ignore-failure": false
     }, 
     "imagefiltersgraph_msaa4.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          14419229469100975106
+          490645687137673004
         ]
       ], 
-      "bugs": [
-        1784
-      ], 
       "reviewed-by-human": true
     }, 
     "imagemagnifier_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           11986702604658484536
         ]
       ], 
       "bugs": [
@@ skipping 3690 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           4470323465740477373
         ]
       ], 
       "ignore-failure": false
     }
   }
 }