Update fontcache expectations

expectations/gm/Test-Android-Nexus7-Tegra3-Arm7-Debug/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 4582 matching lines @@
           "bitmap-64bitMD5", 
           18400047645694418480
         ]
       ], 
       "reviewed-by-human": false
     }, 
     "fontcache_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          15147463239787661010
+          8015235227514811180
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "fontmgr_iter_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           17276962213970077366
         ]
@@ skipping 5159 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           6719196348100419960
         ]
       ], 
       "reviewed-by-human": false
     }
   }
 }