Add convenient support for extending command arguments, now implemented
for 'btrfs check' to cover the low-memory mode. If defined, arguments
are inserted to any 'btrfs check' command in tests. Exceptions could be
defined in common.local.
Signed-off-by: David Sterba <dsterba@suse.com>
Add new keyword to dump the log file after any test fails. Can be useful
for remote analysis of test failures.
Signed-off-by: David Sterba <dsterba@suse.com>
