[12] RFR: 8209880: tzdb.dat is not reproducibly built

[Naoto Sato]

Hello,

Please review the fix to the following issue:
https://bugs.openjdk.java.net/browse/JDK-8209880

The proposed changeset is located at:

http://cr.openjdk.java.net/~naoto/8209880/webrev.00/

The fix is to remove the use of HashSet/Map which is not guaranteed to 
preserve the same order on iteration.

Naoto