chroot: remove xbps dirs after use.

--HG--
extra : convert_revision : 8ad643a877df8c1d5f583b968210ba4fd5664d3d

helper-templates/install-chroot.sh

@@ -80,6 +80,7 @@ install_chroot_pkg()
 umount_chroot_fs()
 {
 	local fs=
+	local dir=
 
 	for fs in sys proc dev xbps xbps_builddir xbps_destdir; do
 		[ ! -f $XBPS_MASTERDIR/.${fs}_mount_bind_done ] && continue
@@ -93,4 +94,8 @@ umount_chroot_fs()
 		fi
 		unset fs
 	done
+
+	for dir in xbps xbps_builddir xbps_destdir; do
+		[ -d $XBPS_MASTERDIR/$dir ] && rmdir $XBPS_MASTERDIR/$dir
+	done
 }