gpgconf: Suggest the use of --gpgconf-test on --launch problems.
* tools/gpgconf-comp.c (gc_component_launch): Change suggestion.
(cherry picked from commit 2a45800b2f8043d2533403eaadf8736d15ad7017)
- GnuPG-bug-id: T4668
- Signed-off-by: Werner Koch <wk@gnupg.org>