Prefix for bundle activation function

Prefix for bundle activation function

This patch introduces a prefix for the activator functions of C++ bundles.
Multiple bundles can now be linked into one application.

Change-Id: I7f345bf1a81eac9616adbf9b975a7f8565c8c172
Signed-off-by: Markus Jung <markus.jung@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2581
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Hun-je Yeon <hunje.yeon@samsung.com>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>