add gitlab-ci builds of libdrm

add gitlab-ci builds of libdrm

It currently does 4 builds: 2 using Meson and 2 using Autotools, 2 using
the latest dependencies on ArchLinux and 2 using very old dependencies
on Debian (including manually building libpciaccess to have the oldest
version supported, to make sure it keeps being supported).

All the build options are turned on for both Meson and Autotools.

Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Daniel Stone <daniels@collabora.com>