[tlbuild] trial builds for TL'13

[Ken Brown]

On 3/23/2013 5:18 PM, Karl Berry wrote:
> I'd like to hear about all of your various environments -- gcc version,
> overall os and/or kernel version, any notes that would be useful to
> someone else using your system who wants to compile the sources.  Ok to
> send that info just to me, or here to the list, whichever you like.

It builds fine on Cygwin using gcc-4.5.3, with no test failures.  I 
built svn rev 29527.

Ken