unified: correct comment about number of threads in phil demo

A bit of work has to be done by someone why wants to run the demo with a
different number of threads than the default.

Fixes ZEP-1077.

Change-Id: Ibb5cfed2bd9984bcf0f9d65f957f32daf4c5211e
Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
1 file changed