Prevent pkg-config not found issue
This patch was in iotivity 1.1-rel branch,
and (wrongly) removed in 1.2.0
So it needed to be reintroduced in upstream 1.2-rel
and as a patch for 1.2.0, track upstream bug at:
https://jira.iotivity.org/browse/IOT-1219
Bug-AGL: SPEC-158
Thanks-to: Alison Chaiken
Change-Id: I6af59a590f8be489398623d29cf85c2f00000002
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>