[vala] (16 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:

  0a757d7... build: Add --enable-test-asan configure option
  108844e... coverage: Build gidl-bindings
  8e84068... ci: Add .gitlab-ci.yml
  7757575... ci: Add ubuntu:16.04 run with gcc
  7a68f03... ci: Add ubuntu:devel run with clang and address-sanitizer
  11f91d2... ci: Add archlinux:latest run with gcc
  0b92c70... ci: Pin archlinux before glibc bump
  9fde262... ci: Add alpine:edge run with gcc
  de1b6f2... ci: Always deploy

Commits added to the branch:

  a94816b... codegen: Free intermediate temp-variables of postcondition  (*)
  452d0c9... codegen: Use the one available source_reference for interna (*)
  3c77546... codegen: Fix access to captured generics in async method of (*)
  8f2864a... tests: Add "string concat" test for POSIX to increase cover (*)
  0c117bb... codegen: Don't ever create null-aware free macro for Generi (*)
  4eb297a... codegen: Don't add generics arguments/parameters to async f (*)
  277fbf4... build: Add --enable-test-asan configure option
  4a785ae... coverage: Build gidl-bindings
  7b123cd... ci: Add .gitlab-ci.yml
  b20c23c... ci: Add ubuntu:16.04 run with gcc
  7125c0d... ci: Add archlinux:latest run with gcc
  953cbd5... ci: Pin archlinux before glibc bump
  55c7e50... ci: Add alpine:edge run with gcc
  dfab92e... ci: Add fedora:rawhide run with clang
  d0011fb... Fedora rawhide is broken
  2f0ec54... ci: Always deploy

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