[TASK] Remove OPLK_* macros from demo applications

The OPLK_* macros are only useful inside the stack. The demo applications are
always running in user-space and can therefore rely on the standard ANSI C
functions.

Change-Id: Ifec379cf66961edbdff6a2eb45bc1b2605c243c7
[TASK] Remove stack includes from application pcap-console helper functions

The pcap-console helper module is cleaned up to not contain any stack
includes.

Change-Id: If049851adf196cf44cacca6b4a9457d338bd3e91