Attempt hhvm build fix

tests/Monolog/Handler/DynamoDbHandlerTest.php

@@ -21,7 +21,9 @@ class DynamoDbHandlerTest extends TestCase
             $this->markTestSkipped('aws/aws-sdk-php not installed');
         }
 
-        $this->client = $this->getMockBuilder('Aws\DynamoDb\DynamoDbClient')->disableOriginalConstructor()->getMock();
+        $this->client = $this->getMockBuilder('Aws\DynamoDb\DynamoDbClient')
+            ->setMethods(array('formatAttributes', '__call'))
+            ->disableOriginalConstructor()->getMock();
     }
 
     public function testConstruct()