[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:

  fc580a2... glib/glibmm/*.h: Mark classes and methods with GLIBMM_API
  b6ce7be... tools/m4: Allow one to decorate the generated wrap() protot
  d450e93... tools: Allow generating Glib:Error class with decorations
  8d04e3c... glib/src: Decorate classes and methods with GLIBMM_API
  9ec8cb8... build: Do not use gendef.exe for glibmm

Commits added to the branch:

  fb3601f... glib/glibmm/*.h: Mark classes and methods with GLIBMM_API
  7eb8793... tools/m4: Allow one to decorate the generated wrap() protot
  8725cbb... tools: Allow generating Glib:Error class with decorations
  65e7543... glib/src: Decorate classes and methods with GLIBMM_API
  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