[gtk/msvc-project-improvements: 2/4] config-msvc.mak.in: Record the interface age

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

commit fc8b70cbdf599d835b23eccdee8054b6d6a1a3c9
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Mon Jan 3 15:37:58 2022 +0800

    config-msvc.mak.in: Record the interface age
    
    We want to make use of this so that we can generate the various versioned
    sources easily, such as the Windows .rc scripts and the [gdk|gtk]version*.h.

 win32/config-msvc.mak.in | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/win32/config-msvc.mak.in b/win32/config-msvc.mak.in
index 4de46e431d..e5ef631cd5 100644
--- a/win32/config-msvc.mak.in
+++ b/win32/config-msvc.mak.in
@@ -52,6 +52,7 @@ demo_sources = $(demo_sources) $(font_features_demo)
 !endif
 
 # Please do not change anything beneath this line unless maintaining the NMake Makefiles
+GTK_INTERFACE_AGE = @GTK_INTERFACE_AGE@
 GTK_VERSION = @GTK_VERSION@
 
 GDK_PREPROCESSOR_FLAGS =       \