Add the missing dependency so the binary is guaranteed to exist before
the pytest is executed.

Bug: https://bugs.gentoo.org/963846
--- a/lib/krb5/krb/Makefile.in
+++ b/lib/krb5/krb/Makefile.in
@@ -512,7 +512,7 @@
 	$(RUN_TEST) ./t_sname_match
 	$(RUN_TEST) ./t_valid_times
 
-check-pytests: t_expire_warn t_get_etype_info t_vfy_increds
+check-pytests: t_expire_warn t_get_etype_info t_vfy_increds t_cc_config
 	$(RUNPYTEST) $(srcdir)/t_expire_warn.py $(PYTESTFLAGS)
 	$(RUNPYTEST) $(srcdir)/t_vfy_increds.py $(PYTESTFLAGS)
 	$(RUNPYTEST) $(srcdir)/t_in_ccache_patypes.py $(PYTESTFLAGS)