See http://tug.org/texlive/pkgupdate.html for what information there is
on the CTAN-to-TL update process.
To add a new architecture:
- check that the config.guess output maps to our architecture name
(the `platform' routine in TeXLive/TLUtils.pm)
- create directory in Master/bin and add at least one file
- add lzma and lzmadec binaries in Master/tlpkg/installer
- add description in Master/tlpkg/TeXLive/TLUtils.pm
- regenerate tlpdb.