Modify primer to utilise file_contents macro.

Author: Matthew Hall

modules/exploits/windows/http/generic_http_dll_server.rb

@@ -55,7 +55,7 @@ def initialize(info={})
   end
 
   def primer 
-    self.exe_contents = generate_payload_dll
+    self.file_contents = generate_payload_dll
     print_status("File available on #{unc}...")
     if datastore['StripExt']
       share = "#{unc}".gsub(/\.dll/,'')