[time_fmt] Add the new time_fmt to Makefile.am.
[time_fmt] Add the new time_fmt to Makefile.am.

Makefile.in is a generated file and will get overwritten on the next
autogen run.

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