Update description

Author: wchen-r7

modules/exploits/multi/browser/adobe_flash_opaque_background_uaf.rb

@@ -21,7 +21,12 @@ def initialize(info={})
         tested on:
 
         Windows 7 SP1 (32-bit), IE11 and Adobe Flash 18.0.0.203,
-        Windows 7 SP1 (32-bit), Firefox 38.0.5 and Adobe Flash 18.0.0.194
+        Windows 7 SP1 (32-bit), Firefox 38.0.5 and Adobe Flash 18.0.0.194,
+        Windows 7 SP1 (32-bit), IE9 and Adobe Flash Flash 18.0.0.203,
+        Windows 7 SP1 (32-bit), Firefox + Adobe Flash 18.0.0.194,
+        windows 8.1, Firefox and Adobe Flash 18.0.0.203,
+        Windows 8.1, Firefox and Adobe Flash 18.0.0.160, and
+        Windows 8.1, Firefox and Adobe Flash 18.0.0.194
       },
       'License'             => MSF_LICENSE,
       'Author'              =>