configure: Make rpmlint optional
Distributions may want to run comprehensive fastcheck or lint tasks,
but rpmlint tool is mandatory for these targets while some platforms
don't have it at all.
With this change the rpmlint becomes optional for fastcheck, devcheck
and lint make targets.
Note: rpmlint option is disabled by default.
To enable: ./configure --enable-rpmlint
To explicitly disable: ./configure --disable-rpmlint
Fixes: https://pagure.io/freeipa/issue/8768
Signed-off-by: Stanislav Levin <slev@altlinux.org>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>