The library-test is supposed to compile and link as an external
program, so we should update the way the headers are included.
Signed-off-by: David Sterba <dsterba@suse.com>
Add test for linkage error of lookup_path_rootid. The built binary has
to be run to catch also run-time errors.
Signed-off-by: David Sterba <dsterba@suse.com>