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

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

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "aaclip_gpu.png": {
       "allowed-digests": [
@@ skipping 1793 matching lines @@
           15132983112101508052
         ]
       ], 
       "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", 
           15054322479285185584
         ]
       ], 
       "ignore-failure": false
     }, 
@@ skipping 2131 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           4826467782721885987
         ]
       ], 
       "ignore-failure": false
     }
   }
 }