[packages/meson] - install rpm macros for meson prep/build/install, rel 2

[Jan Palus]

On 03.02.2025 11:06, Jan Palus wrote:
> On 03.02.2025 10:10, baggins wrote:
> > commit 181b4a43bc70a3d8032d2d79434a37df8ffcd867
> > Author: Jan Rękorajski <baggins at pld-linux.org>
> > Date:   Mon Feb 3 09:59:20 2025 +0100
> > 
> >     - install rpm macros for meson prep/build/install, rel 2
> 
> Mind that these macros use %{_smp_build_ncpus} which requires
> rpm.org >= 4.15 and is unconstrained by anything in our macros hence you
> got "-j 56" instead of expected "-j 28" in glycin build.
> 
> Also --default-library=both is lost which otherwise defaults to
> "shared".

We actually ship two %meson macros now... I guess we should settle on
single one. The one from meson does not set any compiler paths or flags
while ours does not make use of %{_vpath_*} macros.