Update fontcache expectations

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

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 6442 matching lines @@
           "bitmap-64bitMD5", 
           11987204656394981007
         ]
       ], 
       "reviewed-by-human": false
     }, 
     "fontcache_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          15720178186502724169
+          2312624822061919118
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "fontmgr_iter_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           14818252557016116600
         ]
@@ skipping 7146 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           10591909693224673086
         ]
       ], 
       "reviewed-by-human": false
     }
   }
 }