easy-setup: Add missing path for android ndk-r13b

easy-setup: Add missing path for android ndk-r13b

[IOT-1863]force to include missing  header for build with ndk-r13b

current android build script using ndk-r10d
when update ndk as ndk-r13b,
it showing build fail due missing header file.
So, force to include missing header file

Change-Id: Ic23ab789f907c4e576e83bccc0c26f41350a6446
Signed-off-by: bg.chun <bg.chun@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/17525
Reviewed-by: George Nash <george.nash@intel.com>
Reviewed-by: Larry Sachs <larry.j.sachs@intel.com>
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Rick Bell <richard.s.bell@intel.com>
(cherry picked from commit 73b39d4c5450f0863fce16743ee424b5cb95ddfd)
Bug: https://jira.iotivity.org/browse/IOT-1863
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/21019