[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:

  4759bce... build: Add --enable-test-asan configure option
  4ef18cd... coverage: Build gidl-bindings
  60cf6b7... ci: Add .gitlab-ci.yml
  893aba6... ci: Add ubuntu:16.04 run with gcc
  aba3889... ci: Add ubuntu:devel run with clang and address-sanitizer
  ff94d1d... ci: Add archlinux/base:latest run with gcc
  72e003e... ci: Add alpine:edge run with gcc
  1cb208b... ci: Always deploy

Commits added to the branch:

  1525da7... sdl2: Fix a couple of binding errors and attribute issues (*)
  563e4d7... Release 0.51.1 (*)
  d955732... build: Add --enable-test-asan configure option
  4e61eed... coverage: Build gidl-bindings
  64a896b... ci: Add .gitlab-ci.yml
  8e63df1... ci: Add ubuntu:16.04 run with gcc
  db85329... ci: Add ubuntu:devel run with clang and address-sanitizer
  bc6a3ff... ci: Add archlinux/base:latest run with gcc
  00051e7... ci: Add alpine:edge run with gcc
  7ad39ad... ci: Always deploy

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