Use Match constant in BES as well

Author: egypt

lib/msf/core/exploit/remote/browser_exploit_server.rb

@@ -362,7 +362,7 @@ def get_detection_html(user_agent)
       <%= js_os_detect %>
       <%= js_ajax_post %>
       <%= js_misc_addons_detect %>
-      <%= js_ie_addons_detect if os.match(/^Windows/) and client == HttpClients::IE %>
+      <%= js_ie_addons_detect if os.match(OperatingSystems::Match::WINDOWS) and client == HttpClients::IE %>
 
       function objToQuery(obj) {
         var q = [];
@@ -388,7 +388,7 @@ def get_detection_html(user_agent)
           "<%=REQUIREMENT_KEY_SET[:flash]%>"       : window.misc_addons_detect.getFlashVersion()
         };
 
-        <% if os.match(/^Windows/) and client == HttpClients::IE %>
+        <% if os.match(OperatingSystems::Match::WINDOWS) and client == HttpClients::IE %>
           d['<%=REQUIREMENT_KEY_SET[:office]%>'] = window.ie_addons_detect.getMsOfficeVersion();
           d['<%=REQUIREMENT_KEY_SET[:mshtml_build]%>'] = ScriptEngineBuildVersion().toString();
           <%