[tlbuild] patches from Debian

[Karl Berry]

    [mktexlsr]
    -treefile="${TMPDIR-/tmp}/mktexlsrtrees$$.tmp"
    +treefile=`mktemp --tmpdir mktexlsrtrees.XXXXXXXXXX` || exit 1

I installed it (for the pretest, i.e., in the sources, not in current
runtime).

    [texmf.cnf]
     TEX = etex
    +TEX.pmpost = eptex

I installed that one too (in the sources).

Thanks,
K