tools: Regenerate autoconf

This seems to have been omitted in many recent commits.  The earliest
of which are, according to git-bisect:
  154137dfdb  stubdom/configure      stubdom: add xenstore pvh stubdom
  cc83ee4c6c  all configure scripts  NetBSD: Fix lock directory path
but it seems that this is true of several later commits too.

Release status: I consider this discrepancy a release critical bug.

Signed-off-by: Ian Jackson <iwj@xenproject.org>
Release-acked-by: Ian Jackson <iwj@xenproject.org>

tools/configure

@@ -4038,7 +4038,7 @@ XEN_SCRIPT_DIR=$XEN_CONFIG_DIR/scripts
 
 case "$host_os" in
 *freebsd*) XEN_LOCK_DIR=$localstatedir/lib ;;
-*netbsd*) XEN_LOCK_DIR=$localstatedir/run ;;
+*netbsd*) XEN_LOCK_DIR=$rundir_path ;;
 *) XEN_LOCK_DIR=$localstatedir/lock ;;
 esac