Most importantly, this change required updating the ANTLR 2.x expression to
install the Python run-time library. While we're at it, we're building the
run-time library for C++ and Java, too. There is still work to be done: the
stringtemplate library doesn't find antlr.py without help yet.
svn path=/nixpkgs/trunk/; revision=14489
610aac30c3