double ".ccx" for each source files in the .filters in the
testVS2013Ide.
this patch fix that.

Change-Id: Ic06800c260800f72254038e30119db40fe048037
Reviewed-on: https://gerrit.libreoffice.org/33892Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: jan iversen <jani@documentfoundation.org>