[glib] build/win32/replace.py: Add Note On Its Reusability

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

commit ecd265288319c004a862a29c95487a888f62cfc7
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Fri Sep 25 17:47:33 2015 +0800

    build/win32/replace.py: Add Note On Its Reusability
    
    Add a note stating that this script can be copied for use to replace
    strings in files when necessary, such as replacing autotools variables
    in non-autotools builds, such as Visual Studio builds.

 build/win32/replace.py |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/build/win32/replace.py b/build/win32/replace.py
index ea75daf..69ef417 100644
--- a/build/win32/replace.py
+++ b/build/win32/replace.py
@@ -2,7 +2,11 @@
 #
 # Simple utility script to manipulate
 # certain types of strings in a file
-#
+
+# This can be used in various projects where
+# there is the need to replace strings in files,
+# and is copied from GLib's $(srcroot)/build/win32
+
 # Author: Fan, Chun-wei
 # Date: September 03, 2014