Update fontMgr expectations for Mac/Linux/Windows

expectations/gm/Test-Ubuntu12-ShuttleA-GTX660-x86-Release/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 9875 matching lines @@
           "bitmap-64bitMD5", 
           10917815554845967025
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "fontmgr_iter_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          7960294501510835471
+          4160702815259466556
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "fontmgr_iter_msaa16.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          7960294501510835471
+          4160702815259466556
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "fontmgr_iter_nvprmsaa4.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          4118212306234775421
+          833164447570626967
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "fontmgr_match_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           2642821964627964924
         ]
@@ skipping 9747 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           14883391086059083985
         ]
       ], 
       "reviewed-by-human": true
     }
   }
 }