Avoid pathological filename, breaking checkout on some systems.

This is a cherry-pick of 8cb45ee0 .
Author: Andrea Pescetti <pescetti@apache.org>
Date:   Sat May 11 11:39:07 2013 +0000

Conflicts:
    icon-themes/galaxy/svx/res/symphony/

Change-Id: I125e506531248c167cda20714228777e102a24e9
Reviewed-on: https://gerrit.libreoffice.org/3984Reviewed-by: Fridrich Strba <fridrich@documentfoundation.org>
Tested-by: Fridrich Strba <fridrich@documentfoundation.org>