Ignore the failure of this flaky PDF test.

expectations/gm/Test-Mac10.6-MacMini4.1-GeForce320M-x86-Release/expected-results.json

Index: expectations/gm/Test-Mac10.6-MacMini4.1-GeForce320M-x86-Release/expected-results.json
diff --git a/expectations/gm/Test-Mac10.6-MacMini4.1-GeForce320M-x86-Release/expected-results.json b/expectations/gm/Test-Mac10.6-MacMini4.1-GeForce320M-x86-Release/expected-results.json
index 1ddf91c37049c13b2791eb9eaf8e189432a07208..6ef736abe679870c90e3f46ae7678b7c01f5a9ed 100644
--- a/expectations/gm/Test-Mac10.6-MacMini4.1-GeForce320M-x86-Release/expected-results.json
+++ b/expectations/gm/Test-Mac10.6-MacMini4.1-GeForce320M-x86-Release/expected-results.json
@@ -12294,10 +12294,7 @@
           12114185262432977992
         ]
       ], 
-      "bugs": [
-        1578

[scroggo, 2013/10/03 19:33:18]

This bug refers to needing to review everything. Is there a PDF specific bug I
can cite here for this flaky test?

-      ], 
-      "reviewed-by-human": false
+      "ignore-failure": true
     }, 
     "tilemode_gradient_pdf-poppler.png": {
       "allowed-digests": [
@@ -12965,4 +12962,4 @@
       "reviewed-by-human": false
     }
   }
-}
+}