Fix typo in method name: setNewProcessPio -> setNewProcessPrio

Fix typo in method name: setNewProcessPio -> setNewProcessPrio

An obvious typo was introduced in that method whose function is to
update the new process priority.

Change-Id: Id0600f339426c147fb75f0f157769298c3b6dfe7
Signed-off-by: Raphaël Beamonte <raphael.beamonte@gmail.com>
Reviewed-on: https://git.eclipse.org/r/70502
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-by: Hudson CI
Reviewed-by: Alexandre Montplaisir <alexmonthy@efficios.com>
Tested-by: Alexandre Montplaisir <alexmonthy@efficios.com>