[gtk/gtk-3-24] Update README.win32 on features and Visual Studio support

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

commit c3ece1b24c1dcf7f4513157997cedb9c6f3e92f8
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Fri Jan 18 17:01:47 2019 +0800

    Update README.win32 on features and Visual Studio support
    
    Let people know that up to Visual Studio 2017 is supported, and on
    enabling additional features which are not enabled by default.

 README.win32 | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/README.win32 b/README.win32
index 08779db477..4c2464e3f0 100644
--- a/README.win32
+++ b/README.win32
@@ -156,11 +156,14 @@ Use the Microsoft compiler, cl and Make, nmake. Say nmake -f
 makefile.msc in gdk and gtk. Be prepared to manually edit various
 makefile.msc files, and the makefile snippets in build/win32.
 
-There are also VS 2008/2010 solution and project files to build GTK+, which
+There are also VS 2008~2017 solution and project files to build GTK+, which
 are maintained by Chun-wei Fan.  They should build GTK+ out of the box,
 provided that the afore-mentioned dependencies are installed.  They will
 build GDK with the Win32 backend, GTK+ itself (with GAIL/a11y built in),
-the GAIL-Util library and the gtk-demo program.
+the GAIL-Util library and the gtk-demo program.  Please also refer to the
+README file(s) that reside in build/win32 on how to enable additional features
+that are not enabled by default, such as EGL support via libANGLE, which
+emulate the GL/EGL calls using Direct3D 9/11.
 
 Please refer to the following GNOME Live! page for a more detailed ouline
 on the process of building the GTK+ stack and its dependencies with Visual