add two more common time formats
add two more common time formats

Since 26cd9f59 introduced stricter timestamp parsing so that
the full string now has to be matched, several of the 3rd party
formats installable via "lnav -i extra" broke.  So add a couple
more very common timestamp formats to address these.

tstack/lnav,tstack/lnav,sureshsundriyal/lnav,sureshsundriyal/lnav,tstack/lnav,sureshsundriyal/lnav,tstack/lnav,sureshsundriyal/lnav