gradtext also needed rebaselining from the gamma change

expectations/gm/Test-Android-Logan-Nvidia-Arm7-Debug/expected-results.json

 {
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           16998423976396106083
         ]
       ], 
       "reviewed-by-human": false
@@ skipping 8059 matching lines @@
           "bitmap-64bitMD5", 
           8988444324654919932
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "gradtext_8888.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          16789610920024985846
+          8157217091633419434
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "gradtext_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          18164587864236592342
+          16721733946941939566
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "gradtext_msaa16.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          10260606756375302186
+          8366007750043973832
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "gradtext_nvprmsaa4.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           16847891220631188052
         ]
@@ skipping 5557 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           14510921787218221764
         ]
       ], 
       "reviewed-by-human": true
     }
   }
 }