Visual Studio builds: Add script to generate utility scripts

This will allow the utility scripts glib-mkenums and gdbus-codegen be
generated with the proper info in them, as build systems such as Meson
might look for shebang lines to determine the commands that need to be
called to invoke the scripts (which is necessary for calling these
scripts on standard Windows cmd.exe)

win32/Makefile.am

@@ -3,4 +3,5 @@ SUBDIRS = vs9 vs10 vs11 vs12 vs14 vs15
 EXTRA_DIST = 		\
 	glibpc.py	\
 	pc_base.py	\
-	replace.py
+	replace.py	\
+	gen_util_scripts.py

win32/gen_util_scripts.py

@@ -0,0 +1,32 @@
+# Simple Python script to generate the full .schema.xml files
+
+import os
+import sys
+import argparse
+
+from replace import replace_multi
+
+def main(argv):
+    parser = argparse.ArgumentParser(description='Generate Utility Scripts')
+    parser.add_argument('-t', '--type', help='Script Type (glib-mkenums or gdbus-codegen)', required=True)
+    parser.add_argument('--version', help='Package Version', required=True)
+    args = parser.parse_args()
+
+    replace_items = {'@PYTHON@': 'python',
+                     '@PERL_PATH@': 'perl',
+                     '@GLIB_VERSION@': args.version}
+
+    if args.type == 'glib-mkenums':
+        replace_multi('../gobject/glib-mkenums.in',
+                      '../gobject/glib-mkenums',
+                      replace_items)
+    elif args.type == 'gdbus-codegen':
+        replace_multi('../gio/gdbus-2.0/codegen/gdbus-codegen.in',
+                      '../gio/gdbus-2.0/codegen/gdbus-codegen',
+                      replace_items)
+
+    else:
+        raise ValueError('Type must be glib-mkenums or gdbus-codegen')
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))