only associate one "py.ico" at a time, even if they are located in different directories. Also added Linux /usr/lib/menu entries for the Py apps and XRCed when building the RPMs. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@21194 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775