[vala] (21 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:

  19006b0... coverage: Build gidl-bindings
  9108dc7... ci: Add .gitlab-ci.yml
  e235430... ci: Add ubuntu:16.04 run with gcc
  22f95f4... ci: Add ubuntu:18.04 run with gcc
  cef1724... ci: Add fedora:latest run with clang
  eb07a94... ci: Add archlinux/base:latest run with gcc
  9bd9152... ci: Always deploy

Commits added to the branch:

  7da59be... tests: Extend "fastvapi" test to increase coverage (*)
  059b748... vala: Fix compatible/disposable check between structs and t (*)
  02d821b... xcb: Fix "missing return statement at end of subroutine bod (*)
  1265b39... avahi-client: Fix "use of possibly unassigned parameter" wa (*)
  2145369... gnutls: Fix "use of possibly unassigned parameter" warnings (*)
  b0f0ad0... tokyocabinet: Fix deprecation warnings (*)
  ecdda66... vala: Don't issue a warning for non-public struct fields in (*)
  d9c368a... vapi: Perform syntax and semantic check for all bindings on (*)
  44b19fd... girparser: Add required copy/free attributes for gtype-boxe (*)
  3c4b42d... codegen: Use gtype-boxed API for structs with "g_boxed_free (*)
  b8c28eb... Regenerate GIR-based bindings to pick up copy/free attribut (*)
  dc1d788... glib-2.0: Add binding for "gettext()" (*)
  91fc970... codegen: Make CCodeBaseModule.generate_method_declaration() (*)
  f413cb3... codegen: Fix custom reference-counting for compact classes (*)
  9836967... coverage: Build gidl-bindings
  1128e66... ci: Add .gitlab-ci.yml
  a239c0b... ci: Add ubuntu:16.04 run with gcc
  6a2e5ca... ci: Add ubuntu:18.04 run with gcc
  cd245b0... ci: Add fedora:latest run with clang
  68c0b4a... ci: Add archlinux/base:latest run with gcc
  19e5b35... ci: Always deploy

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