gradtext also needed rebaselining from the gamma change

expectations/gm/Test-Android-Reference-Unknown-Arm64-Debug/expected-results.json

 {
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           16998423976396106083
         ]
       ], 
       "reviewed-by-human": true
@@ skipping 6565 matching lines @@
           "bitmap-64bitMD5", 
           9555354188306079643
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "gradtext_8888.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          8619080718012724544
+          17579229569218059997
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "gradtext_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          3114668928688933986
+          2318743000677221919
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "gradtext_msaa16.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          11111526457360799425
+          5831255353730711152
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "gradtext_nvprmsaa4.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          3114668928688933986
+          2318743000677221919
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "hairlines_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           3746404902639900755
         ]
@@ skipping 5665 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           10030599291822810250
         ]
       ], 
       "reviewed-by-human": true
     }
   }
 }