Resolves: #1211427
    - Rebase to tzdata-2015c
      - Egypt's spring-forward transition is at 24:00 on April's last Thursday,
        not 00:00 on April's last Friday.  2015's transition will therefore be o
        Thursday, April 30 at 24:00, not Friday, April 24 at 00:00.  Similar fix
        apply to 2026, 2037, 2043, etc.
    - Rebase javazic tool to match latest upstream OpenJDK version