elf: Fix tst-dlopen-tlsreinit1.out test dependency

Fixes commit 5097cd34
("elf: Avoid re-initializing already allocated TLS in dlopen
(bug 31717)").

Reported-by: Patsy Griffin <patsy@redhat.com>
Reviewed-by: Patsy Griffin <patsy@redhat.com>
(cherry picked from commit e82a7cb1)