add disc date

Author: Austin

modules/exploits/linux/http/netgear_dgn1000_setup_unauth_exec.rb

@@ -26,6 +26,7 @@ def initialize(info = {})
           ['EDB', '24464'],
           ['URL', 'https://www.exploit-db.com/exploits/25978/'],
       ],
+      'DisclosureDate' => 'Jun 5 2013',
       'License' => MSF_LICENSE,
       'Platform' => 'linux',
       'Arch' => ARCH_MIPSBE,