openat, fdopendir tests: Fix link errors.

openat, fdopendir tests: Fix link errors.

* modules/openat-tests (Depends-on): Add progname.
* modules/fdopendir-tests (Depends-on): Likewise.
* tests/test-fchownat.c: Include progname.h.
(main): Call set_program_name.
* tests/test-fstatat.c: Include progname.h.
(main): Call set_program_name.
* tests/test-mkdirat.c: Include progname.h.
(main): Call set_program_name.
* tests/test-openat.c: Include progname.h.
(main): Call set_program_name.
* tests/test-unlinkat.c: Include progname.h.
(main): Call set_program_name.
* tests/test-fdopendir.c: Include progname.h.
(main): Call set_program_name.