MLBEDSW-8468: overlaps_ranges does not treat the live range end time as inclusive

 - The issue is that live range start and end times are inclusive
but the function to calculate is two ranges overlap treats them as
exclusive
 - The fix is to change the comparison to be inclusive

Change-Id: Iab5ceec7be2a5fdf0d6ecef81509a88c74e7108c
Signed-off-by: Tim Hall <tim.hall@arm.com>