[vala] (15 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:

  391fb7e... ci: Add .gitlab-ci.yml
  8fade7e... ci: Always deploy
  2f893d7... ci: Add ubuntu lts 16.04 run with gcc
  c1878e7... ci: Build and deploy API documentation
  802950e... Use Fedora 29 -- https://bugzilla.redhat.com/show_bug.cgi?i

Commits added to the branch:

  3e09e17... vapi: Add graphene-1.0 to allow smoother transition to grap (*)
  d4da5be... tests: More "unassigned variable" tests to increase coverag (*)
  f938139... build: Pass some useful G_LOG_DOMAIN definitions (*)
  fd3fedf... girwriter: Mention that this file is generated and not mean (*)
  7ac4a4a... girwriter: Properly resolve GLib.TypeInterface instead of h (*)
  fb78200... tests: Fix namespace attributes for girwriter (*)
  7771194... valadoc/tests: construct properties require GLib.Object der (*)
  d4c9da2... codegen: Move GObject property validity checks to SemanticA (*)
  6c8c75f... codegen: Move construct property checks to SemanticAnalyzer (*)
  3fa987e... girwriter: Don't write "property" attribute for non-gobject (*)
  feeceee... ci: Add .gitlab-ci.yml
  61b7eb2... ci: Always deploy
  403721d... ci: Add ubuntu lts 16.04 run with gcc
  5394969... ci: Build and deploy API documentation
  ff854bc... Use Fedora 29 -- https://bugzilla.redhat.com/show_bug.cgi?i

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