gradtext also needed rebaselining from the gamma change

expectations/gm/Test-Android-Xoom-Tegra2-Arm7-Release/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 5328 matching lines @@
           "bitmap-64bitMD5", 
           9805842470726753368
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "gradtext_8888.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          12332797412638201498
+          5771478138095675386
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "gradtext_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          3141858789282354753
+          16676485181116164325
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "hairlines_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           9293293797458777202
         ]
@@ skipping 3547 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           10082620380128469910
         ]
       ], 
       "reviewed-by-human": true
     }
   }
 }