Update timezone data to 2015e

  Changes affecting future time stamps

    Morocco will suspend DST from 2015-06-14 03:00 through 2015-07-19 02:00,
    not 06-13 and 07-18 as we had guessed.  (Thanks to Milamber.)

    Assume Cayman Islands will observe DST starting next year, using US rules.
    Although it isn't guaranteed, it is the most likely.

Bug: 21836574
Change-Id: I6eda60c220d5c55d2aa0934544866ec0f1ce62ab