Right now systemd declares a requirement on libmount-devel >= 2.30.
But this is only because of fixes in libmount 2.30 that matter at
runtime. For fuzzing (and to build) any libmount version is enough.
https://github.com/systemd/systemd/commit/c0b4b0f8f548c755dee81b
relaxed the version check in systemd. To fix the build we need to
install libmount-dev (and pkg-config, because meson requires that
for pkg-config deps to actually work).
Fixes#1191.
* [systemd] Add initial systemd integration
* Add @keszybz to auto_ccs
* Use ppa:pitti/systemd-semaphore for libmount backport
* Simplify build now that dependencies are disabled
* Update Dockerfile to use upstream repo
Zbigniew Jędrzejewski-Szmek