tst-env-setuid: Use support_capture_subprogram_self_sgid
Use the support_capture_subprogram_self_sgid to spawn an sgid child.
Reviewed-by:
Carlos O'Donell <carlos@redhat.com>
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Use the support_capture_subprogram_self_sgid to spawn an sgid child.
Reviewed-by:
Carlos O'Donell <carlos@redhat.com>