t/lib-gpg: require GPGSSH for GPGSSH_VERIFYTIME prereq

The GPGSSH_VERIFYTIME prequeq makes use of "${GNUPGHOME}" but does not
create it.  Require GPGSSH which creates the "${GNUPGHOME}" directory.

Additionally, it makes sense to require GPGSSH in GPGSSH_VERIFYTIME
because the latter builds on the former.  If we can't use GPGSSH,
there's little point in checking whether GPGSSH_VERIFYTIME is usable.

Suggested-by: Junio C Hamano <[email protected]>
Signed-off-by: Todd Zullinger <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: tmzullinger

t/lib-gpg.sh

@@ -135,6 +135,7 @@ test_lazy_prereq GPGSSH '
 '
 
 test_lazy_prereq GPGSSH_VERIFYTIME '
+	test_have_prereq GPGSSH &&
 	# Check if ssh-keygen has a verify-time option by passing an invalid date to it
 	ssh-keygen -Overify-time=INVALID -Y check-novalidate -s doesnotmatter 2>&1 | grep -q -F "Invalid \"verify-time\"" &&