gdal: add Java MDB driver option

This adds a option to enable building the OGR [ESRI Personal Geodatabase read-only MDB driver (Java-based)](http://www.gdal.org/ogr/drv_mdb.html). Includes [a gist patch](https://gist.github.com/dakcarto/6877854) for `./configure` that supports finding both Apple- and Oracle-based Java JDK installs.

Patch tested on Mac 10.7.5 with Apple-supported Java 1.6, and on Mac 10.8.5 with Oracle Java 1.7 install. Not tested on Mac 10.6.8, yet, nor on Mac 10.7.5 with Oracle installed over Apple-supported.

More information is available in the description for the upstream [GDAL ticket #5267](http://trac.osgeo.org/gdal/ticket/5267).