Add blobshader GM baselines.

expectations/gm/Test-Win8-ShuttleA-HD7770-x86-Debug/expected-results.json

 {
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           12831071530564277917
         ]
       ], 
       "bugs": [
@@ skipping 12849 matching lines @@
     }, 
     "textblob_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           8450106420219141611
         ]
       ], 
       "reviewed-by-human": true
     }, 
+    "textblobshader_8888.png": {
+      "allowed-digests": [
+        [
+          "bitmap-64bitMD5", 
+          7057717820172896383
+        ]
+      ], 
+      "reviewed-by-human": true
+    }, 
+    "textblobshader_gpu.png": {
+      "allowed-digests": [
+        [
+          "bitmap-64bitMD5", 
+          10961049554077302632
+        ]
+      ], 
+      "reviewed-by-human": true
+    }, 
     "texteffects_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           9805106273662486358
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "texteffects_8888.png": {
@@ skipping 989 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           10845440994435344847
         ]
       ], 
       "reviewed-by-human": false
     }
   }
 }