The command 'make check' is called from 'make distcheck' (which is
used to generate official util-linux tarballs).
It means that tests/ stuff has to be compatible with autotools and
differentiate between source and build directories.
* remove run-nonroot.sh (merged into run.sh
* remove commands.sh.in
* all tests and top level run.sh accept --builddir and --srcdir
command line options
* functions.sh modified to use $top_builddir/tests for output files
Signed-off-by: Karel Zak <kzak@redhat.com>