asterisk-13.x: fix config file issues

asterisk-13.x: fix config file issues

- The configuration file protection for modules does not work when there
  is more than one configuration file. Currently conffiles is populated
  with a space separated list. But the items need to be separated by
  newlines. With spaces, only the first item gets added to conffiles. The
  remaining items are dropped and not protected. Fix this by replacing
  spaces with newlines. Revision bump because this could lead to
  overwriting files unintentionally.
- Remove a duplicate '/etc/asterisk/modules.conf' from
  Package/asterisk13/conffiles.
- Remove '/etc/asterisk/rtp.conf' from Package/asterisk13/conffiles
  because the file is installed and protected by res-rtp-asterisk.
- Add missing stasis.conf and pjsip_wizard.conf.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>