Adding SkLumaXfermode GM results.

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

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_gpu.png": {
       "allowed-digests": [
@@ skipping 1146 matching lines @@
     }, 
     "linepath_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           5682113047049520500
         ]
       ], 
       "ignore-failure": false
     }, 
+    "lumamode_565.png": {
+      "allowed-digests": [
+        [
+          "bitmap-64bitMD5", 
+          14139681226373687263
+        ]
+      ]
+    }, 
+    "lumamode_8888.png": {
+      "allowed-digests": [
+        [
+          "bitmap-64bitMD5", 
+          9095296973707702820
+        ]
+      ]
+    }, 
+    "lumamode_gpu.png": {
+      "allowed-digests": [
+        [
+          "bitmap-64bitMD5", 
+          12063489238562316052
+        ]
+      ]
+    }, 
     "matrixconvolution_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           8194666704613577884
         ]
       ], 
       "ignore-failure": false
     }, 
     "modecolorfilters_gpu.png": {
@@ skipping 482 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           9019242913965337895
         ]
       ], 
       "ignore-failure": false
     }
   }
 }