new hairlines gm unstable on hd2000

NOTRY=True
TBR=
BUG=skia:

Review URL: https://codereview.chromium.org/800543002

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

@@ -8375,6 +8375,7 @@
           14068005127069681159
         ]
       ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "hairlines_pdf-poppler.png": {
@@ -14225,4 +14226,4 @@
       "reviewed-by-human": true
     }
   }
-}
+}

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

@@ -8248,6 +8248,7 @@
           9966730557110500201
         ]
       ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "hairlines_pdf-poppler.png": {
@@ -13961,4 +13962,4 @@
       "reviewed-by-human": true
     }
   }
-}
+}

expectations/gm/Test-Win7-ShuttleA-HD2000-x86_64-Debug/expected-results.json

@@ -8404,6 +8404,7 @@
           1682013033344086714
         ]
       ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "hairlines_pdf-poppler.png": {
@@ -14263,4 +14264,4 @@
       "reviewed-by-human": true
     }
   }
-}
+}