Updating .gitignore to unignore NetBeans project settings for do_jdbc
Updating .gitignore to unignore NetBeans project settings for do_jdbc

* Since the do_jdbc (common JDBC code) project is almost entirely
  written in Java code, a working IDE project should be provided for
  convenience sake, to allow developers to get up and running very
  quickly with this popular IDE.
* The do_jdbc/nbproject was already in the tree, but being ignored by
  the top-level .gitignore rule.

Signed-off-by: Alex Coles <07b1bd43bec0751d878a3f03ea589427ab84a876@mac.com>

simonkro/do_mysql,simonkro/do_mysql,simonkro/do_mysql