lisa.trace: Add update_time field to sched_pelt_cfs event
lisa.trace: Add update_time field to sched_pelt_cfs event

This is needed for the upcoming RqInvariance.test_util_correctness and
RqInvariance.test_load_correctness() tests.

Signed-off-by: Dietmar Eggemann <b09ca079358248c3ff5bd91ea3781c6808cc6cf2@arm.com>

ARM-software/lisa,credp/lisa,ARM-software/lisa,credp/lisa,ARM-software/lisa,credp/lisa,ARM-software/lisa,credp/lisa