RFR: 8274407: (tz) Update Timezone Data to 2021c

Wed Oct 6 17:26:09 UTC 2021

On Wed, 6 Oct 2021 01:24:49 GMT, Naoto Sato <naoto at openjdk.org> wrote:

> This PR is to upgrade the time zone data in the JDK to IANA's tzdata2021c level. Note that the tz data is "as is", as released by IANA. No `merged links` are retracted.
> The PR also fixes two issues along with the 2021c upgrade.

Marked as reviewed by rriggs (Reviewer).

-------------

PR: https://git.openjdk.java.net/jdk/pull/5832