[glib] Visual Studio builds: Fix gio project generation

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

commit e013164c5c5b776acee409f726dc4f0ae5dc6e2b
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Tue Mar 14 14:48:23 2017 +0800

    Visual Studio builds: Fix gio project generation
    
    We need to include gcontenttype-win32.c in our Visual Studio projects...

 gio/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gio/Makefile.am b/gio/Makefile.am
index df318ba..67db1b7 100644
--- a/gio/Makefile.am
+++ b/gio/Makefile.am
@@ -339,6 +339,7 @@ win32_actual_sources = \
 
 win32_more_sources_for_vcproj = \
        gwin32appinfo.c \
+       gcontenttype-win32.c \
        gregistrysettingsbackend.c \
        win32/gwinhttpfile.c \
        win32/gwinhttpfileinputstream.c \