[gimp] (14 commits) Non-fast-forward update to branch wip/Jehan/meson-windows-official

[Jehan <jehanp src gnome org>]

The branch 'wip/Jehan/meson-windows-official' 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:

  cf2a389... build: let's test Windows build in meson.
  c9da06f... meson: fix broken directx declare_dependency().
  c74e211... modules: fix one more broken meson rule for directx on Wind
  7876fe5... build: do not build file-mng for 32-bit Windows.
  55ba84a... build: no need to build the reference API for the Windows b
  b1fd209... meson: fix libmng test.
  cfda7c8... configure: prioritize pkg-config check for libmng.
  870947a... configure, libgimp: disable GIR build when cross-compiling 
  6f19c1b... configure, tools: colorsvg2png must be built as native buil
  3736b8f... libgimp: fix linking in autotools when cross-compiling.
  4ef47e7... meson, plug-ins: further fix the no-pkg-config test for lib
  16f5942... build: use a PNG for installer. DON'T PUSH!
  7666336... Plop.

Commits added to the branch:

  a86040b... gitlab-ci: Set container explicitly to docker (*)
  354b0c2... build: let's now build the Windows installer with meson.
  b27dd3d... meson: fix broken directx declare_dependency().
  5703b89... modules: fix one more broken meson rule for directx on Wind
  6ae69f5... build: do not build file-mng for 32-bit Windows.
  fbb484c... build: no need to build the reference API for the Windows b
  c9a34b8... meson: fix libmng test.
  8a6613b... configure: prioritize pkg-config check for libmng.
  e866cb7... configure, libgimp: disable GIR build when cross-compiling 
  8099d6b... configure, tools: colorsvg2png must be built as native buil
  ca0350c... libgimp: fix linking in autotools when cross-compiling.
  49732c2... meson, plug-ins: further fix the no-pkg-config test for lib
  7a22a6b... configure, meson: the build tool depends on very old glib.
  d85e4e8... INSTALL: update with new recommendation of meson for Window

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