[vala] (12 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:

  c2e803e... coverage: Build gidl-bindings
  952d1b5... ci: Add .gitlab-ci.yml
  9145211... ci: Add ubuntu:16.04 run with gcc
  ac107d2... ci: Add archlinux:latest run with gcc
  7439cca... ci: Pin archlinux before glibc bump
  2337e90... ci: Add alpine:edge run with gcc
  6c08e17... ci: Add fedora:rawhide run with clang
  ccf767a... Fedora rawhide is broken
  d57bd41... ci: Always deploy

Commits added to the branch:

  6ad1127... gio-2.0: Unhide a few usable symbols which are marked not i (*)
  f00ab1c... vala: Warn about unsupported cast to void and drop it (*)
  b713f09... valadoc: Correctly format background of inline @link's (*)
  bbe331e... coverage: Build gidl-bindings
  fe49f96... ci: Add .gitlab-ci.yml
  1950de8... ci: Add ubuntu:16.04 run with gcc
  6b157df... ci: Add archlinux:latest run with gcc
  fe6cd8b... ci: Add alpine:edge run with gcc
  9ac5bab... ci: Add fedora:rawhide run with clang
  f5b5654... Fedora rawhide is broken
  ebee55c... Ubuntu devel is broken
  e46ee47... ci: Always deploy

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