tests: drop unused link dependency

tests: drop unused link dependency

Ever since commit 2392b18099, openat and fdopendir no longer drag in
xalloc-die through indirect dependencies, so these tests no longer
need $(LIBINTL).

* modules/areadlinkat-tests (Makefile.am): Drop stale LDADD.
* modules/dirent-safer-tests (Makefile.am): Likewise.
* modules/fdopendir-tests (Makefile.am): Likewise.
* modules/mkfifoat-tests (Makefile.am): Likewise.
* modules/openat-safer-tests (Makefile.am): Likewise.
* modules/openat-tests (Makefile.am): Likewise.
* modules/readlinkat-tests (Makefile.am): Likewise.
* modules/symlinkat-tests (Makefile.am): Likewise.
* modules/linkat-tests (Makefile.am): Likewise.
(Depends-on): Switch to filenamecat-lgpl.
* modules/fdutimensat-tests (test_fdutimensat_LDADD): Drop unused
LIBINTL.
* modules/utimensat-tests (test_utimensat_LDADD): Likewise.
* tests/test-linkat.c (main): Don't require xalloc.

Signed-off-by: Eric Blake <eblake@redhat.com>