Mark dashing gpu as expected to fail on win7/gpu/intel

expectations/gm/base-shuttle-win7-intel-directwrite/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "aaclip_gpu.png": {
       "allowed-digests": [
@@ skipping 1802 matching lines @@
           15857302678163965353
         ]
       ], 
       "ignore-failure": false
     }, 
     "dashing_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           11137490508568328458
-        ],
-        [
-          "bitmap-64bitMD5", 
-          4904536750140494702
         ]
       ], 
-      "ignore-failure": false
+      "ignore-failure": true
     }, 
     "degeneratesegments_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           5037191661353682037
         ]
       ], 
       "ignore-failure": false
     }, 
@@ skipping 2104 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           13632669295194296329
         ]
       ], 
       "ignore-failure": false
     }
   }
 }