Ignore failures in arithmode_gpu GM test on Nexus 4

expectations/gm/Test-Android-Nexus4-Adreno320-Arm7-Release/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 176 matching lines @@
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }, 
     "arithmode_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          2517464688252538320
+          10552604774821201076
         ]
       ], 
-      "ignore-failure": false
+      "bugs": [
+        1595
+      ], 
+      "ignore-failure": true
     }, 
     "bezier_conic_effects_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           16679240203551417269
         ]
       ]
     }, 
     "bezier_cubic_effects_gpu.png": {
@@ skipping 7895 matching lines @@
     "xfermodes_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           9019242913965337895
         ]
       ], 
       "ignore-failure": false
     }
   }
-}
+}