add baseline for clip_strokerect

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

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 3963 matching lines @@
         [
           "bitmap-64bitMD5", 
           8264377152451149106
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }, 
+    "clip_strokerect_angle.png": {
+      "allowed-digests": [
+        [
+          "bitmap-64bitMD5", 
+          13890106243991361094
+        ]
+      ], 
+      "reviewed-by-human": true
+    }, 
     "clipped-bitmap-shaders-clamp-hq_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           5543970311616574408
         ]
       ], 
       "bugs": [
         1759
       ], 
@@ skipping 11748 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           10591909693224673086
         ]
       ], 
       "reviewed-by-human": false
     }
   }
 }