[Simulator] Specified the run-time path and provided 64-bit support

[Simulator] Specified the run-time path and provided 64-bit support
for eclipse plugins.

1. Added support to use eclipse plugins on 64-bit linux machines.
   Created seperate folder under /libs in plugins for
   32-bit and 64-bit libraries.
   Updated the MANIFEST file to load the libraries
   corresponding to the underlying architecture.
2. Specified the run-time path to help the loader to find the
   dependent libraries of oc in resource/src/SConscript
   for simulator to avoid the need to set the LD_LIBRARY_PATH
   to run the plugins.
3. Moved the code to load the simulator libraries
   from plugins to Java SDK.

Change-Id: Ia9b9e8542c4e82c18768dcc25c9ae727614ff7bf
Signed-off-by: G S Senthil Kumar <senthil.gs@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/7631
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>