git: openjdk/jdk16u: 8260356: (tz) Upgrade time-zone data to tzdata2021a

[Sean Coffey]

Changeset: 78cf59ba
Author:    Kiran Sidhartha Ravikumar <kravikumar at openjdk.org>
Committer: Sean Coffey <coffeys at openjdk.org>
Date:      2021-02-08 16:49:31 +0000
URL:       https://git.openjdk.java.net/jdk16u/commit/78cf59ba

8260356: (tz) Upgrade time-zone data to tzdata2021a

Backport-of: d9aefa36ac1d4b711a3082e3ce6c442d4cb8e718

! make/data/tzdata/VERSION
! make/data/tzdata/africa
! make/data/tzdata/leapseconds