xbps-src: do not umount if <masterdir>/.xbps_chroot_working is there.

xbps-src/libexec/xbps-src-chroot-helper.sh.in

@@ -60,7 +60,8 @@ mount_chroot_fs()
 				echo 1 > ${XBPS_MASTERDIR}/.${f}_mount_bind_done
 				echo "done."
 			else
-				echo "failed."
+				echo "FAILED!!!!!"
+				exit 1
 			fi
 		else
 			cnt=$(cat ${XBPS_MASTERDIR}/.${f}_mount_bind_done)
@@ -74,6 +75,10 @@ umount_chroot_fs()
 {
 	local fs dir cnt
 
+	if [ -f ${XBPS_MASTERDIR}/.xbps_chroot_working ]; then
+		return 0
+	fi
+
 	for fs in ${REQFS}; do
 		[ ! -f ${XBPS_MASTERDIR}/.${fs}_mount_bind_done ] && continue
 		cnt=$(cat ${XBPS_MASTERDIR}/.${fs}_mount_bind_done)
@@ -88,7 +93,7 @@ umount_chroot_fs()
 				rm -f ${XBPS_MASTERDIR}/.${fs}_mount_bind_done
 				echo "done."
 			else
-				echo "failed."
+				echo "FAILED!!!"
 			fi
 		fi
 		unset fs