[vala] (19 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:

  d5ca218... coverage: Build gidl-bindings
  87125f3... ci: Add .gitlab-ci.yml
  308444f... ci: Add ubuntu:16.04 run with gcc
  c643a46... ci: Add ubuntu:18.04 run with gcc
  db3ae3d... ci: Add fedora:rawhide run with clang
  0a72ad3... ci: Add archlinux/base:latest run with gcc
  db2012b... ci: archlinux/bison - https://bugs.archlinux.org/task/64165
  00a2c8d... ci: Add alpine:edge run with gcc
  270df42... ci: Always deploy

Commits added to the branch:

  a74d7ac... codegen: More use of delegate_target_type and delegate_targ (*)
  b202924... vala: CodeNode.source_reference is optional, so let the API (*)
  eebf2ad... valadoc: Don't call CodeContext.pop() on empty stack (*)
  1d1a0cc... curses: Correctly use [PrintfFormat] attribute (*)
  cfc1347... valadoc: Refactor setup of main runtime (*)
  64ad6bb... vala: Convert Report.*() to real printf-like functions (*)
  545121d... codegen: Make use of new printf-like API of Report.*() (*)
  1d78426... vala: Make use of new printf-like API of Report.*() (*)
  46daf30... libvaladoc/girimporter: Skip "docsection" elements in <name (*)
  d348eab... valadoc: Correctly set verbose flag on CodeContext (*)
  ec286dd... coverage: Build gidl-bindings
  44a9913... ci: Add .gitlab-ci.yml
  8bd06f2... ci: Add ubuntu:16.04 run with gcc
  69c0647... ci: Add ubuntu:18.04 run with gcc
  fc678f7... ci: Add fedora:rawhide run with clang
  f5fa9b1... ci: Add archlinux/base:latest run with gcc
  2b834bd... ci: archlinux/bison - https://bugs.archlinux.org/task/64165
  9454798... ci: Add alpine:edge run with gcc
  e27f3af... ci: Always deploy

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