[tlbuild] Support for musl

[Norbert Preining]

Hi Karl, hi Henri,

> I (tersely) wrote the other things necessary for adding (or removing) a
> platform in tlpkg/doc/packages.txt (xz binaries, tlpsrc lists, pruning

Ok, will go through it.

Henri, can you please send me xz and wget
  http://tug.org/texlive/build.html#xz
Thanks.

Norbert

--
PREINING Norbert                               http://www.preining.info
Accelia Inc.     +    JAIST     +    TeX Live     +    Debian Developer
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