[jdk13u-dev] RFR: 8255226: (tz) Upgrade time-zone data to tzdata2020d

[Dmitry Cherepanov]

Request to backport tzdata2020d. Applies cleanly, no regressions found.

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Commit messages:
 - Backport b65ff60a8e36bd1f4b531abe68962f4691359964

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/59/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=59&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8255226
  Stats: 61 lines in 4 files changed: 38 ins; 2 del; 21 mod
  Patch: https://git.openjdk.java.net/jdk13u-dev/pull/59.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/59/head:pull/59

PR: https://git.openjdk.java.net/jdk13u-dev/pull/59