[glibmm] (8 commits) Non-fast-forward update to branch use-dllexport-2-62

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

The branch 'use-dllexport-2-62' 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:

  da6ea6f... build: Do not use gendef.exe for glibmm
  cd66762... gio/src/*.hg: Mark classes and functions with GIOMM_API
  2362f61... gio/giomm/*.h: Mark classes and functions with GIOMM_API
  3660370... Visual Studio builds: build giomm without gendef
  61eafe9... glibmm: Update glibmmconfig.h.[in|meson] for MSVC
  d5901cd... Drop gendef
  7517758... meson: Do not allow static MSVC-style builds
  16a68d9... m4: Apply function decoration more thoroughly

Commits added to the branch:

  04ae132... build: Do not use gendef.exe for glibmm
  6c99b4f... gio/src/*.hg: Mark classes and functions with GIOMM_API
  419ca38... gio/giomm/*.h: Mark classes and functions with GIOMM_API
  990ce4a... Visual Studio builds: build giomm without gendef
  85755d7... glibmm: Update glibmmconfig.h.[in|meson] for MSVC
  7c591f9... Drop gendef
  9da42cd... meson: Do not allow static MSVC-style builds
  5201fbd... m4: Apply function decoration more thoroughly