Rebaseline convexclip2_aa gpu on win7

expectations/gm/Test-Win7-ShuttleA-HD2000-x86-Release/expected-results.json

 {
   "expected-results": {
     "complexclip2_rrect_aa_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           10759708425409840734
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "complexclip2_rrect_aa_8888.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           12767037474212720761
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "complexclip2_rrect_aa_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          11042904879899740810
+          8965486191034121270
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "drawbitmaprect_565-serialize.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           8441718207005165472
         ]
@@ skipping 242 matching lines @@
         ]
       ], 
       "bugs": [
         2167
       ], 
       "ignore-failure": true, 
       "reviewed-by-human": true
     }
   }
 }