[vala] (9 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:

  550735f... build: Add --enable-test-asan configure option
  b8d5c52... coverage: Build gidl-bindings
  ab1590e... ci: Add .gitlab-ci.yml
  3a8fba7... ci: Add ubuntu:16.04 run with gcc
  c8b0046... ci: Add ubuntu:devel run with clang and address-sanitizer
  08d8094... ci: Add archlinux/base:latest run with gcc
  5520924... ci: Add alpine:edge run with gcc
  9d794d1... ci: Always deploy

Commits added to the branch:

  c040d65... Release 0.51.2 (*)
  dc01eed... build: Add --enable-test-asan configure option
  82d1ef1... coverage: Build gidl-bindings
  1b722bf... ci: Add .gitlab-ci.yml
  f72a1ba... ci: Add ubuntu:16.04 run with gcc
  092f80f... ci: Add ubuntu:devel run with clang and address-sanitizer
  ac3c1d4... ci: Add archlinux/base:latest run with gcc
  2282efd... ci: Add alpine:edge run with gcc
  06d30d6... ci: Always deploy

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