pdfviewer: ignore flanky test

Review URL: https://codereview.chromium.org/64223008

git-svn-id: http://skia.googlecode.com/svn/trunk@12285 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/expectations/gm/Test-Mac10.8-MacMini4.1-GeForce320M-x86_64-Release/expected-results.json b/expectations/gm/Test-Mac10.8-MacMini4.1-GeForce320M-x86_64-Release/expected-results.json
index 4ab5a85..562cf97 100644
--- a/expectations/gm/Test-Mac10.8-MacMini4.1-GeForce320M-x86_64-Release/expected-results.json
+++ b/expectations/gm/Test-Mac10.8-MacMini4.1-GeForce320M-x86_64-Release/expected-results.json
@@ -8407,9 +8407,10 @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          4287669296405914847
+          3624180917783566168
         ]
       ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "giantbitmap_mirror_point_rotate_565.png": {