Update leap-seconds to leap-seconds.3757622400.

As per https://datacenter.iers.org/data/latestVersion/16_BULLETIN_C16.txt:

INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS)

SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE

SERVICE DE LA ROTATION TERRESTRE DE L'IERS
OBSERVATOIRE DE PARIS
61, Av. de l'Observatoire 75014 PARIS (France)
Tel. : +33 1 40 51 23 35
e-mail : services.iers@obspm.fr
http://hpiers.obspm.fr/eop-pc

                    Paris, 07 January 2019

                    Bulletin C 57

                    To authorities responsible
                    for the measurement and
                    distribution of time

INFORMATION ON UTC - TAI

NO leap second will be introduced at the end of June 2019.
The difference between Coordinated Universal Time UTC and the
International Atomic Time TAI is :

from 2017 January 1, 0h UTC, until further notice : UTC-TAI = -37 s

Leap seconds can be introduced in UTC at the end of the months of December
or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every
six months, either to announce a time step in UTC, or to confirm that there
will be no time step at the next possible date.

                                            Christian BIZOUARD
                                            Director
                                            Earth Orientation Center of IERS
					    Observatoire de Paris, France

Requested by: rgrimes
Obtained from: ftp://tycho.usno.navy.mil/pub/ntp/leap-seconds.3757622400
MFC after: 3 days