Security: Enable NSS config

The icedtea package uses a flag during ./configure to set NSS security and
ensure the requirements are there. The local machine used for axDev-JDK
includes the required package (libnss3), so let's include this by default.

    NOTE: nss.cfg may need to be adjusted per build env

Original patch from: http://icedtea.wildebeest.org/download/source/icedtea-2.4.1.tar.gz