[PATCH] ci: combine static and shared linking build tests

[Aaron Conole]

David Marchand <david.marchand at redhat.com> writes:

> Save some cpu time and disk by testing linking against static and shared
> library in single environments.
>
> The .ci/linux-build.sh is modified so it reconfigures an existing build
> directory: an empty DEF_LIB= means that static and shared builds are
> to be tested.
>
> ABI checks, documentation generation and unit tests are disabled for
> static builds as they would be redundant with the check against
> dynamically linked binaries, if any.
>
> Note:
> - --cross-file is an option that can be passed to meson only when
>   creating a build environment,
> - for some other reason, --buildtype and other non -D options are only
>   accepted when setting up a build directory with meson. When
>   reconfiguring, only their -D$option forms are accepted,
>
> Signed-off-by: David Marchand <david.marchand at redhat.com>
> ---

Probably also saves overall time because we would need fewer runners.  I
think this is a good change.

Acked-by: Aaron Conole <aconole at redhat.com>