gradtext also needed rebaselining from the gamma change

expectations/gm/Test-Android-Nexus7-Tegra3-Arm7-Debug/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 5276 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", 
-          4568590113783332044
+          10834702694171852812
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "hairlines_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           3746404902639900755
         ]
@@ skipping 3526 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           4896933091710642125
         ]
       ], 
       "reviewed-by-human": true
     }
   }
 }