adapt default mount point

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>

usr/bin/arch-create-system

@@ -30,7 +30,7 @@ dryrun=0
 quiet=0
 verbose=0
 
-mount_point="/mnt"
+mount_point="/run/mount/target"
 label_prefix="BTRFS"
 root_password="password"
 disk_dev_root="/dev/sda"
@@ -250,6 +250,8 @@ create_fs_structure () {
 	eval "$cmd"
 	if [ $? -gt 0 ]; then
 	    die "Can't mount root filesystem ${PREFIX}-${LABEL}"
+	else
+	    df $MOUNT_POINT
 	fi
     fi