[vala] (10 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:

  0364eaf... coverage: Build gidl-bindings
  ade7f76... ci: Add .gitlab-ci.yml
  4285182... ci: Add ubuntu:16.04 run with gcc
  b8864b8... ci: Add ubuntu:18.04 run with gcc
  301ae48... ci: Add fedora:latest run with clang
  d78581e... ci: Add archlinux/base:latest run with gcc
  39112dc... ci: Always deploy

Commits added to the branch:

  98d7546... tests: Extent "girwriter" test to increase coverage (*)
  cfb2e99... codegen: Drop unreachable and misplaced code (*)
  7ca183c... tests: Extent "post-condition" virtual method test to incre (*)
  fd01161... coverage: Build gidl-bindings
  c580e9b... ci: Add .gitlab-ci.yml
  bc2b738... ci: Add ubuntu:16.04 run with gcc
  0ae8a1a... ci: Add ubuntu:18.04 run with gcc
  56f83d9... ci: Add fedora:latest run with clang
  67d8399... ci: Add archlinux/base:latest run with gcc
  c3bf703... ci: Always deploy

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