End the polite fiction that build/tools/create-archive.py is used to build the
release because it isn't and all the last releases were built using different
scripts. Document their use in more details.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74561 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775