Marc-André Lureau authored Jan 17, 2019 and Frediano Ziglio committed Jul 09, 2019

Maintaining 1 build system is hard. Maintaining 2 is even harder.

It seems the meson build system is now in good shape to replace
autotools. Like many desktop projects, let's move entirely to meson
and drop autotools support.

Known changes:
- generating changelog files in the dist tarball. This is not strictly
  required, and can be added back later.
- generated files are not included in the dist tarball. In some ways,
  this can be considered a good thing.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Victor Toso <victortoso@redhat.com>