tools/gpgtar: Use the new exectool helper.
* tools/Makefile.am: gpgtar now requires neither npth nor libassuan. * tools/gpgtar-create.c (gpgtar_create): Use the new 'sh-exectool' helper. * tools/gpgtar-extract.c (gpgtar_extract): Likewise. * tools/gpgtar-list.c (gpgtar_list): Likewise. * tools/gpgtar.c (main): Set default gpg program. Drop the initialization of npth and libassuan.
- Signed-off-by: Justus Winter <justus@g10code.com>