[gtk] (5 commits) Non-fast-forward update to branch gtk-2-24.win.fixes

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

The branch 'gtk-2-24.win.fixes' 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:

  bb7cefb... gtk/gtkiconcache.c: Fix running on GLib-2.57.3 or later on 

Commits added to the branch:

  417c4f9... MSVC projects: "Install" libwimp.pdb (*)
  639688d... [gdk|gtk]/Makefile.am: Fix CFlags passed to introspecion on (*)
  0b7ee98... MSVC builds: Improve pkg-config files generation (*)
  16682dd... MSVC builds: Fix pkg-config file generation (*)
  4612f0b... gtk/gtkiconcache.c: Fix running on GLib-2.57.3 or later on 

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