[glib] win32/gen_util_scripts.py: Update script type error message

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

commit 2204034b9ff1925a60bafd369217bcccda2300d7
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Thu Sep 7 10:56:18 2017 +0800

    win32/gen_util_scripts.py: Update script type error message
    
    We should also mention glib-genmarshal in the acceptable types, since it
    is now a Python script.
    
    Pointed out by John Emmas

 win32/gen_util_scripts.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/win32/gen_util_scripts.py b/win32/gen_util_scripts.py
index b595aa0..a3dfdee 100644
--- a/win32/gen_util_scripts.py
+++ b/win32/gen_util_scripts.py
@@ -32,7 +32,7 @@ def main(argv):
                       replace_items)
 
     else:
-        raise ValueError('Type must be glib-mkenums or gdbus-codegen')
+        raise ValueError('Type must be glib-mkenums, glib-genmarshal or gdbus-codegen')
 
 if __name__ == '__main__':
     sys.exit(main(sys.argv))