Mark morphology test as expected-to-fail for poppler.

expectations/gm/Test-Ubuntu12-ShuttleA-ATI5770-x86_64-Release/expected-results.json

Index: expectations/gm/Test-Ubuntu12-ShuttleA-ATI5770-x86_64-Release/expected-results.json
diff --git a/expectations/gm/Test-Ubuntu12-ShuttleA-ATI5770-x86_64-Release/expected-results.json b/expectations/gm/Test-Ubuntu12-ShuttleA-ATI5770-x86_64-Release/expected-results.json
index a87acd0848ef427cf62a0fd02205ed6e35475047..f6aca8abb49559fadace8e17b107fe60f3aad512 100644
--- a/expectations/gm/Test-Ubuntu12-ShuttleA-ATI5770-x86_64-Release/expected-results.json
+++ b/expectations/gm/Test-Ubuntu12-ShuttleA-ATI5770-x86_64-Release/expected-results.json
@@ -7789,8 +7789,9 @@
         ]
       ], 
       "bugs": [
-        1578
+        1657
       ], 
+      "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "nested_aa_565.png": {
@@ -10934,4 +10935,4 @@
       "reviewed-by-human": false
     }
   }
-}
+}