Merge branch 'mount/qemu-user' of https://github.com/t-8ch/util-linux

* 'mount/qemu-user' of https://github.com/t-8ch/util-linux:
  mount: (tests) run bind mount tests on qemu-user
  ci: (s390x) run container privileged and with access to /dev
  mount: (tests) also skip tests on private,slave propagation
  mount: (tests) skip fstab-btrfs on broken ENOTTY return
  lsns: (tests) skip nsfs test on broken ENOTTY return
  tests: (test_sysinfo) add helper for invalid ioctl errno
  libmount: fix some typos

diff --cc tests/functions.sh
Simple merge