RXTX-2.1-7 native libs amd64

[Ajit]

Using RXTX JAVA Communication API 2.1-7 downloaded from http://www.jcontrol.org/download/rxtx_en.html

# lsb_release -rd
Description: Linux Mint 14 Nadia
Release: 14

# apt-cache policy openjdk-6-jdk
openjdk-6-jdk:
  Installato: 6b27-1.12.6-1ubuntu0.12.10.4
  Candidato: 6b27-1.12.6-1ubuntu0.12.10.4
  Tabella versione:
 *** 6b27-1.12.6-1ubuntu0.12.10.4 0
        500 http://archive.ubuntu.com/ubuntu/ quantal-updates/universe amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ quantal-security/universe amd64 Packages
        100 /var/lib/dpkg/status
     6b24-1.11.4-3ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ quantal/universe amd64 Packages

# Steps
code file attached

# Expected
communicating with the serial port
(with java-6-openjdk-i386 and java-7-openjdk-i386 is working fine)

# What happened instead
bug report attached