[tlbuild] trial builds for TL'13

[Karl Berry]

    1.  Should we rebuild asy now?

No.

    2.  We do not have biber for this platform - is this ok?

It's ok with me.  We don't have biber for many platforms.
If you want to get into the biber build, please see
biblatex-biber.sourceforge.net and/or write Phil Kime.  That happens
outside of the TL build.

Thanks,
karl