7.2-stable patches

added patches:
	fs-refuse-fspick-on-internal-superblocks.patch
	namespace-check-the-target-before-walking-it-in-do_mount_setattr.patch
	namespace-don-t-copy-an-unmounted-mount-tree.patch
	namespace-don-t-inherit-mnt_umount-in-clone_mnt.patch
	statmount-read-the-parent-of-an-unmounted-mount-under-mount_lock.patch