bridging: Remove lib/lib64 path as unsupported on clang

bridging: Remove lib/lib64 path as unsupported on clang

I believe they are not used since they are built in in compiler (spec),
especialy on compilation step.

Observed issue on GNU/Linux is:

  clang++-3.5 \
  -o out/linux/x86_64/release/bridging/mpm_client/MPMSampleClient.o \
  -c -std=c++0x -Wall -Wextra -Werror -Os -Wall -Wextra -fPIC -m64 -Llib64 \
  (...) MPMSampleClient.cpp
  clang: error: argument unused during compilation: '-Llib64'

Change-Id: Ifaf6f0b4f67d992392ca60e53a2d8fd54e1051fb
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/18421
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Ossama Othman <ossama.othman@intel.com>
Reviewed-by: George Nash <george.nash@intel.com>
Reviewed-by: Todd Malsbary <todd.malsbary@intel.com>
(cherry picked from commit 53d888e18973eb5e16a174ea75532bf42a3aa576)
Bug: https://jira.iotivity.org/browse/IOT-1745
Reviewed-on: https://gerrit.iotivity.org/gerrit/19149
Reviewed-by: Dan Mihai <Daniel.Mihai@microsoft.com>
Reviewed-by: Mats Wichmann <mats@linux.com>