rebaseline: gradients in pdf

expectations/gm/Test-Mac10.7-MacMini4.1-GeForce320M-x86_64-Release/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 7882 matching lines @@
           "bitmap-64bitMD5", 
           13769721931430179596
         ]
       ], 
       "ignore-failure": false
     }, 
     "gradients_pdf-mac.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          6736091326135630598
+          10678716687376625835
         ]
       ], 
       "ignore-failure": false
     }, 
     "gradients_view_perspective_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           17885302293750926150
         ]
@@ skipping 5135 matching lines @@
           10424380103329133154
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }
   }
 }