[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:

  7bc0d43... coverage: Build gidl-bindings
  26d32b7... ci: Add .gitlab-ci.yml
  ce17988... ci: Add ubuntu:16.04 run with gcc
  40c4b5e... ci: Add ubuntu:18.04 run with gcc
  6ca9bbf... ci: Add fedora:latest run with clang
  8009c42... ci: Add archlinux/base:latest run with gcc
  2b931f5... ci: archlinux/bison - https://bugs.archlinux.org/task/64165
  a3669ff... ci: Always deploy

Commits added to the branch:

  d11ee98... vala: Report error for async creation expression without yi (*)
  a91ac04... codegen: Fix vfunc signature of delegate-typed property in  (*)
  9ca70b4... codegen: Share generate_struct_*() helpers between classes  (*)
  5bf8402... vala: Don't require constant initializer in fast-vapi (*)
  eda9da8... coverage: Build gidl-bindings
  6247c72... ci: Add .gitlab-ci.yml
  9eab292... ci: Add ubuntu:16.04 run with gcc
  e2718d5... ci: Add ubuntu:18.04 run with gcc
  acacc6a... ci: Add fedora:latest run with clang
  ffab977... ci: Add archlinux/base:latest run with gcc
  06b501b... ci: archlinux/bison - https://bugs.archlinux.org/task/64165
  e9fc5af... ci: Always deploy

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