Adding SkLumaXfermode GM results.

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": {
     "aaclip_565.png": {
       "allowed-digests": [
@@ skipping 2808 matching lines @@
     }, 
     "linepath_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           12871350969119851668
         ]
       ], 
       "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", 
+          11779066633798873793
+        ]
+      ]
+    }, 
     "matrixconvolution_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           14455070414837455898
         ]
       ], 
       "ignore-failure": false
     }, 
     "matrixconvolution_8888.png": {
@@ skipping 1263 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           1893175418427715444
         ]
       ], 
       "ignore-failure": false
     }
   }
 }