GCJ backend checked in on branch.

[Garrett Rooney <ro...@electricjellyfish.net>]

I've committed my current work on a GCJ backed Lucene4c on the 
gcj-backend branch in Subversion.  Feel free to grab it from:

https://svn.apache.org/repos/asf/incubator/lucene4c/branches/gcj-backend

Indexing is currently working (for text fields only at the moment, more 
to follow as I find use for them), and searching should be done this 
weekend sometime, assuming I get around to it.  The build system is 
still rather hardcoded, so you'll have to hack the makefile to get it to 
work on your system.  I also need to go in and make the CLI and unit 
tests work again, since they're currently not up to date with the new API.

This is currently based on the Jar file from lucene-1.4.3, just like 
PyLucene.  I had some trouble with the version of Lucene I compiled out 
of the trunk in Subversion, although I'm pretty sure it's just me 
screwing up some of the CNI code, since using the same Jar from GCJ 
compiled Java worked fine.  Something to revisit when we're further 
along I guess.

If anyone else has a chance to play with this I'd love to hear about it, 
since so far it's only been tried on my laptop, running Ubuntu Linux 
with GCJ 4.0, so I'm anxious to hear if other people have similar 
experiences with the code.

-garrett