liboverlay: Do not dump error logs for pipe priority failures.

If validate call fails due to pipe priority mismatch, do not dump
overlay logs. For low tier targets, due to pipe crunching, these
failures are expected. Such frames will be handled by the next
composition strategy in the decision tree.

Change-Id: I00886f87239c8725ca1b03f9b5709bf3cc137566
1 file changed