agent,kbx: Add LIBASSUAN_CLFAGS.
* agent/Makefile.am (gpg_preset_passphrase_CFLAGS, t_protect_CFLAGS): Add LIBASSUAN_CFLAGS. * kbx/Makefile.am (libkeybox_a_CFLAGS, libkeybox509_a_CFLAGS): Likewise.
- GnuPG-bug-id: T5389
- Signed-off-by: Jakub Jelen <jjelen@redhat.com>