tests: Don't check 'Getopt::Long' corner cases
Depending on the installed 'Getopt::Long' perl module, command-line
handling may vary a bit. As a consequence we prefer not to check
command-line corners cases. This change fixes automake bug#29638.
* t/aclocal.sh (am_create_testdir): Don't expect "--versi" to be
interpreted as "--version".
* t/automake-cmdline.tap: Don't expect "--vers" to be interpreted as
"--version" and things after "--" to be interpreted as file arguments.
(do_check): Display the actual command output.
* t/maken3.sh (check_targets): "--force" is not a documented option, so
don't use it.