Fix typo on match string for opera_configoverwrite

Author: HD Moore

modules/exploits/multi/browser/opera_configoverwrite.rb

@@ -17,7 +17,7 @@ class Metasploit3 < Msf::Exploit::Remote
   autopwn_info({
     :ua_name => HttpClients::OPERA,
     :ua_maxver => "9.10",
-    :os_name => [ OperatingSystems::Match::WINDOWS, OperatingSystems::Match::MAC_OSX, ],
+    :os_name => [ OperatingSystems::Match::WINDOWS, OperatingSystems::Match::LINUX ],
     :javascript => true,
     :rank => ExcellentRanking, # reliable cmd exec, cleans up after itself
     :vuln_test => nil,