Merge branch 'test_mkfds-dont-free-and-close-when-exit-with-error' of https://github...

* 'test_mkfds-dont-free-and-close-when-exit-with-error' of https://github.com/masatake/util-linux:
  tests: (test_mkfds) don't close fds and free memory objects when exiting with EXIT_FAILURE
  tests: (test_mkfds,refactor) simplify nested if conditions
  tests: (test_mkfds) save errno before calling system calls for clean-up
  tests: (test_mkfds, cosmetic) add an empty line before the definition of struct sysvshm_data