[tlbuild] trial builds for TL'13

[Taco Hoekwater]

On 03/24/2013 10:40 PM, Karl Berry wrote:
>
> Ok, so I bit the bullet and edited cairo-1.12.8/configure.ac to add
> AM_MAINTAINER_MODE (and AM_PROG_AR, which automake told me was needed),
> and did reautoconf with our stock versions of the autotools.  Committed
> changes in r29491.  So ... please try again, with fingers crossed.  (It
> builds for me, which proves nothing, since this whole thing always
> worked for me.)

This seems to have done the trick for me as well. Backported to metapost
and luatex repositories.

Best wishes,
Taco