Add tool to check for duplicate accelerators

The tool mentioned in tdf#94865. It should be possible to use in
any installed locale. It uses the accessibility api to read the menus
and retrieve the menu items and it's associated accelerator keys.

Change-Id: I3abe1bff526db15e40c5cf792588c5eda1fbedad
Reviewed-on: https://gerrit.libreoffice.org/22039Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Jan Holesovsky <kendy@collabora.com>

officecfg/README

@@ -4,3 +4,8 @@ If you change change a file in this module, then a make postprocess is needed af
 
 See also:
 [[configmgr]]
+
+AcceleratorKeyChecker.fodt in the util folder is a tool written in Basic that check menues for 
+entries that use the same accellerator key. The tool goes through the menues using the accessibility
+api and checkes the accellerator keys. For information on how to use the tool open the fodt file
+in LibreOffice.