[vala] (11 commits) Non-fast-forward update to branch wip/meson

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/meson' 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:

  f9a5a3f... Add initial Meson build system
  475c48b... meson: Avoid object clash of scanner.vala in libvaladoc
  c986cb9... meson: Add tests

Commits added to the branch:

  c89c305... valadoc/tests: Add the source vapi directory to driver-test (*)
  f127816... vapigen: Mark given source-files as such and force girparse (*)
  1c8e2dd... doclets: Explicitly link against libvala-*.la (*)
  b2f72e2... build: Add missing include of Makefile.common (*)
  917d457... valadoc/tests: Add ./vala/.libs rather than ./gee/.libs to  (*)
  914f5c6... Add initial Meson build system
  900f265... meson: Avoid object clash of scanner.vala in libvaladoc
  3a97fa3... meson: Add tests
  de15263... WIP meson: Add vapi building
  e372bd8... codegen: Don't use temp for owned internal variables
  f5441a3... Test

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