[tlbuild] Support for musl

[Karl Berry]

Hi Henri,

    How would I go about this?

In short, get the sources and run ./Build, as Norbert (laconically :) said.
If we're all very lucky, the configure script will adapt to whatever you
have. We probably won't be lucky, but the only way forward is to try it.

More on getting the sources: http://tug.org/texlive/svn/
More on doing the build: http://tug.org/texlive/build.html
Even more on building: http://tug.org/texlive/doc/tlbuild.html

However, I wouldn't spend a lot of time reading at first. Just run
./Build (or, equivalently, ./configure && make) and see what happens.

Hope it flies,
Karl