PROJ1615: Correct display of build total time when tv_usec wraps
PROJ1615: Correct display of build total time when tv_usec wraps

Signed-off-by: Scott Parlane <85029adc3fa41ef14594a57826619713bfe95f25@alliedtelesis.co.nz>

alliedtelesis/buildsyspp,ATL-NZ/buildsyspp