[gtkmm] Update .gitignore

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 329b4a0d56d5bb7b717c11f3e5e1673644ab1dcb
Author: Kjell Ahlstedt <kjell ahlstedt bredband net>
Date:   Tue Sep 15 18:19:09 2015 +0200

    Update .gitignore

 .gitignore |   18 ++++--------------
 1 files changed, 4 insertions(+), 14 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index ff62af3..270d8ce 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,20 +24,10 @@ stamp-h?
 /libtool
 
 # MSVC
-MSVC_Net2005/atkmm/atkmm.rc
-MSVC_Net2005/gdkmm/gdkmm.rc
-MSVC_Net2005/gdkmm/gdkmmconfig.h
-MSVC_Net2005/gtkmm/gtkmm.rc
-MSVC_Net2005/gtkmm/gtkmmconfig.h
-MSVC_Net2008/atkmm/atkmm.rc
-MSVC_Net2008/gdkmm/gdkmm.rc
-MSVC_Net2008/gdkmm/gdkmmconfig.h
-MSVC_Net2008/gtkmm/gtkmm.rc
-MSVC_Net2008/gtkmm/gtkmmconfig.h
-MSVC_Net2010/gdkmm/gdkmm.rc
-MSVC_Net2010/gdkmm/gdkmmconfig.h
-MSVC_Net2010/gtkmm/gtkmm.rc
-MSVC_Net2010/gtkmm/gtkmmconfig.h
+MSVC_Net201?/gdkmm/gdkmm.rc
+MSVC_Net201?/gdkmm/gdkmmconfig.h
+MSVC_Net201?/gtkmm/gtkmm.rc
+MSVC_Net201?/gtkmm/gtkmmconfig.h
 
 # demos
 demos/gtk-demo/demo_resources.c