Message4596

This is a basic patch that adds enough of _rawffi to actually run some
simple ctypes code. It should be fairly obvious how to proceed now.

Issues:
* make ant create a test .so. I have more tests, but unittest has no way
  to skip. Bummer
* I have disabled java security. jna has to be fixed somehow for that.
* More care is needed about field sizes/alignment, I want ant do it
  for me, hardcoding sucks.
* It's unfinished

but the example:
import ctypes
ctypes.CDLL('libc.so.6').time(0)

works on my machine :-)

out2.diff is against CPythonLib