[pypy-dev] Update to the win32 buildbot

[Matti Picus]

Hi! I am cc-ing the pypy-dev list so there is some permanent record of 
this, the mail is for the win32 buildbot maintainer.
Could you add the lzma development libraries to the build environment of 
the win32 buildbot?
They are needed for python 3, as you can see from any of the failing 
build runs like this one
http://buildbot.pypy.org/builders/pypy-c-jit-win-x86-32/builds/2398/steps/shell_1/logs/stdio

Python 3 uses the xz-5.0.5 libraries, as can bee seen in the 
cpython/PCbuild/readme.txt,
following their links leads to http://tukaani.org/xz/ and to a download
http://tukaani.org/xz/xz-5.0.5-windows.zip (library)
http://tukaani.org/xz/xz-5.0.5-windows.zip.sig (signature)

I will try to update the local.zip available on our downloads
https://bitbucket.org/pypy/pypy/downloads/local_2.4.zip
and the documentation
http://doc.pypy.org/en/latest/windows.html
but in the meantime it would be great if you could get this going

Thanks!
Matti