[vala] (14 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:

  5047141... coverage: Build gidl-bindings
  95f923e... ci: Add .gitlab-ci.yml
  ff744fd... ci: Add ubuntu:16.04 run with gcc
  6f60c9c... ci: Add ubuntu:18.04 run with gcc
  6d16f19... ci: Add fedora:latest run with clang
  504c989... ci: Add archlinux/base:latest run with gcc
  8428179... ci: Always deploy

Commits added to the branch:

  6139fcf... glib-2.0: Add "has_typedef = false" to custom MarkupParser* (*)
  bdd1382... vala: Set GLib.Error as symbol of error-types if no error-d (*)
  35bfea8... vala: Make Callable derive from Symbol (*)
  2957adf... codegen: Use SemanticAnalyzer.get_data_type_for_symbol() (*)
  dff819f... codegen: Commonize the determining of return-type for deleg (*)
  dd89c26... Sync NEWS from 0.46 (*)
  2fbb228... Release 0.47.1 (*)
  e68eefa... coverage: Build gidl-bindings
  75cd535... ci: Add .gitlab-ci.yml
  fa687bc... ci: Add ubuntu:16.04 run with gcc
  dd800cc... ci: Add ubuntu:18.04 run with gcc
  bd2f9d2... ci: Add fedora:latest run with clang
  efca02f... ci: Add archlinux/base:latest run with gcc
  6713559... ci: Always deploy

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