tests: Don't use module 'getcwd' as dependency. * modules/getcwd (Comment): New section. * modules/xgetcwd (Comment): Likewise. * modules/xgetcwd-lgpl: New file, based on modules/xgetcwd. * modules/chown-tests (Depends-on): Add xgetcwd-lgpl. Remove xgetcwd. * modules/fchownat-tests (Depends-on): Likewise. * modules/fdutimensat-tests (Depends-on): Likewise. * modules/futimens-tests (Depends-on): Likewise. * modules/lchown-tests (Depends-on): Likewise. * modules/stat-time-tests (Depends-on): Likewise. * modules/utime-tests (Depends-on): Likewise. * modules/utimens-tests (Depends-on): Likewise. * modules/utimensat-tests (Depends-on): Likewise.