gpgconf: Fix another argv overflow if --homedir is used.

* tools/gpgconf-comp.c (gc_component_check_options): Increase array.

I missed to fix that one with the last patch.

Note that there was no problem in 2.2 at thismlocation - probably
because it had been manually backported once.

• GnuPG-bug-id: T5366
• Signed-off-by: Werner Koch <wk@gnupg.org>