bitlbee: Adjust permissions of ${VARBASE}/run/bitlbee

Similarly to ${STATEDIR} ${VARBASE}/run/bitlbee should be owned by
bitlbee:nobody.

This fixes the case when bitlbee is started in daemon mode (via
rc.d/bitlbee) as `bitlbee' User. Now `service bitlbee start|stop'
works properly (previously the pidfile wasn't created in that case).

Index: Makefile
===================================================================
RCS file: /cvsroot/pkgsrc/chat/bitlbee/Makefile,v
retrieving revision 1.74
diff -u -p -r1.74 Makefile
--- Makefile	17 Apr 2018 22:29:35 -0000	1.74
+++ Makefile	18 May 2018 15:06:38 -0000
@@ -41,6 +41,7 @@ DOCDIR=			${PREFIX}/share/doc/bitlbee
 STATEDIR=		${VARBASE}/db/bitlbee
 
 OWN_DIRS_PERMS=		${STATEDIR} bitlbee nobody 700
+OWN_DIRS_PERMS+=	${VARBASE}/run/bitlbee bitlbee nobody 700
 
 PKG_GROUPS=		nobody
 PKG_USERS=		bitlbee:nobody