lei_xsearch: use localtime for user message

lei_xsearch: use localtime for user message

It's probably least confusing for user-facing messages to
display times in the user's configured timezone.  I considered
appending "UTC" to the message and sticking with gmtime(), too,
but this output isn't intended to be web-cache friendly nor
expect users from across multiple timezones to view the same
output.