[vala] (13 commits) Non-fast-forward update to branch wip/ci

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/ci' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  10c72b2... coverage: Build gidl-bindings
  82b934f... ci: Add .gitlab-ci.yml
  361e4ec... ci: Add ubuntu:16.04 run with gcc
  677912c... ci: Add ubuntu:18.04 run with gcc
  5c89f72... ci: Add fedora:latest run with clang
  bf0d305... ci: Add archlinux/base:latest run with gcc
  a033e98... ci: Always deploy

Commits added to the branch:

  5baca30... codegen: Fix setting of generic-type properties for gobject (*)
  8a8db31... girwriter: Add readable="0"/private="1" attribute to type-s (*)
  7cb3a3f... girwriter: Fix position of priv field (--abi-stability) (*)
  8e908c0... codegen: G_DEFINE_AUTOPTR_CLEANUP_FUNC must not declared mo (*)
  988e77e... vala: Improve error reporting for invalid interface prerequ (*)
  9404890... tests: Add invalid "multiple base classes" tests to increas (*)
  d40f732... coverage: Build gidl-bindings
  afe6f22... ci: Add .gitlab-ci.yml
  a50ac83... ci: Add ubuntu:16.04 run with gcc
  f4ee72c... ci: Add ubuntu:18.04 run with gcc
  71ffa7a... ci: Add fedora:latest run with clang
  4d1d7c4... ci: Add archlinux/base:latest run with gcc
  ff468db... ci: Always deploy

(*) This commit already existed in another branch; no separate mail sent