[gobject-introspection] (14 commits) Non-fast-forward update to branch wip/meson

[Nirbheek Chauhan <nirbheekc 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:

  4df57c1... meson: Fix include dir for gir and typelib gen
  b1e5f56... meson: typelib build depends on GObject-2.0.Gir
  645b678... meson: Fix build without pkg-config or any system libs
  495750e... giscanner: Fix options in the preprocessor group
  3408b9f... meson: Have a single place to set the subproject directory
  3e27130... meson: Update symbol visibility rules
  fc1377b... meson: Use symbol visibility for giscanner module
  46580c8... meson: Bump up the Meson version
  b446187... meson: Fix including of config.h
  4f9a431... meson: Remove gir_build hack option
  f473d3b... meson: Handle spaces in the full python path
  24ce440... Revert "meson: Handle spaces in the full python path"
  0e6365e... meson: Don't look for gio-unix-2.0 on Windows

Commits added to the branch:

  28841d9... meson: Fix include dir for gir and typelib gen
  22c0e55... meson: typelib build depends on GObject-2.0.Gir
  61af2ce... meson: Fix build without pkg-config or any system libs
  ee37b47... giscanner: Fix options in the preprocessor group
  9d50164... meson: Have a single place to set the subproject directory
  d5abf39... meson: Update symbol visibility rules
  6be6249... meson: Use symbol visibility for giscanner module
  d7b14ca... meson: Bump up the Meson version
  75fca8c... meson: Fix including of config.h
  cbcc8a8... meson: Remove gir_build hack option
  154c16d... meson: Handle spaces in the full python path
  6354407... Revert "meson: Handle spaces in the full python path"
  febdee7... meson: Don't look for gio-unix-2.0 on Windows
  d8b5e50... The third parameter of assertion_message is an integer.