swift: Add fan-presence and fan-monitor

Swift fails to build because fan-presence is a dependency for
fan-control, and fan-monitor is a dependency for inventory.
So add them in swift with an empty yaml file. Also fix the
FILESEXTRAPATHS_append to have the colon at the beginning
(vs prepend where colon goes at the end) to be able to find
the files in the right order.

Tested: Built swift successfully.

Change-Id: I28fdfdd90f7935eb072d2fdfaa207517701ebbb3
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
3 files changed