[gtk] (19 commits) Non-fast-forward update to branch wip/nirbheek/gtk-3-24-meson

[Chun-wei Fan <fanchunwei src gnome org>]

The branch 'wip/nirbheek/gtk-3-24-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:

  e6935aa... Import meson build files from an 3.22
  288a8e5... tests: Include system headers appropriately
  3a04a7c... meson: Sync build files with master and update to 3.24
  d70a20f... gtk-launch: Fix compilation with MSVC
  70d7578... meson_options.txt: Disable introspection by default
  e73f076... meson: Disable X11 support on Darwin
  b649786... gtk: Fix paste/clipboard usage on macOS
  505ad47... meson: Build fixes for macOS
  12e1dc6... meson: Disable --export-dynamic for clang
  d9e738e... meson: Set the compatibility version correctly on macOS
  3d27120... meson: Add fallback subprojects for more dependencies
  d8d317e... gtk: Fix compiler warning about deprecated declaration
  e005330... meson: Disable discarded-qualifiers warning
  949b0ec... meson: Don't target gnu89 as the c_std
  ef28f67... meson: Fix introspection generation on Linux
  970d759... meson: Cleanup tests and gdk testsuite
  5022bb3... meson: Add wrap files for building with subprojects

Commits added to the branch:

  fc33171... Adwaita: tone down app icon shadows (*)
  f35ce26... color editor: Don't warn if editing is cancelled (*)
  ec4265f... Import meson build files from an 3.22
  80432ff... tests: Include system headers appropriately
  dbb0e9e... meson: Sync build files with master and update to 3.24
  4d45898... gtk-launch: Fix compilation with MSVC
  1fa1c3b... meson_options.txt: Disable introspection by default
  cd85566... meson: Disable X11 support on Darwin
  96d37da... gtk: Fix paste/clipboard usage on macOS
  69e58ff... meson: Build fixes for macOS
  548d6c7... meson: Disable --export-dynamic for clang
  7e3a97b... meson: Set the compatibility version correctly on macOS
  ce818c3... meson: Add fallback subprojects for more dependencies
  3eb76b8... gtk: Fix compiler warning about deprecated declaration
  fa9263c... meson: Disable discarded-qualifiers warning
  cfc6556... meson: Don't target gnu89 as the c_std
  fd75eeb... meson: Fix introspection generation on Linux
  7d4ff86... meson: Cleanup tests and gdk testsuite
  61ec908... meson: Add wrap files for building with subprojects

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