Require authentication to do a force build

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@74453 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Change the XPM string literals to bytes literals.

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@74454 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775