[atk] win32/detectenv-msvc.mak: Support Visual Studio 2017

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

commit 28e8224c77c7f55edb53ca021f4a576cbcc1e5e4
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Fri Feb 17 18:15:58 2017 +0800

    win32/detectenv-msvc.mak: Support Visual Studio 2017
    
    Sync the file from GLib so that we can build the introspection files
    using Visual Studio 2017.

 win32/detectenv-msvc.mak |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/win32/detectenv-msvc.mak b/win32/detectenv-msvc.mak
index 61f979d..6fd96cc 100644
--- a/win32/detectenv-msvc.mak
+++ b/win32/detectenv-msvc.mak
@@ -40,8 +40,10 @@ VSVER = 10
 VSVER = 11
 !elseif $(VCVERSION) > 1799 && $(VCVERSION) < 1900
 VSVER = 12
-!elseif $(VCVERSION) > 1899 && $(VCVERSION) < 2000
+!elseif $(VCVERSION) > 1899 && $(VCVERSION) < 1910
 VSVER = 14
+!elseif $(VCVERSION) > 1909 && $(VCVERSION) < 2000
+VSVER = 15
 !else
 VSVER = 0
 !endif