[jdk8u-dev] RFR: 8235834: IBM-943 charset encoder needs updating

[Shruthi]

Backporting JDK-8235834 - IBM-943 charset encoder needs updating.
There are few characters which display garbled values when using IBM943C, so this mapping file needs to be backported to fix the issue.

Reported issue : https://bugs.openjdk.org/browse/JDK-8235834
Backporting https://github.com/openjdk/jdk/commit/1b925183894778acce8aff4c101f67af98f0097f

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Commit messages:
 - Backport 1b925183894778acce8aff4c101f67af98f0097f

Changes: https://git.openjdk.org/jdk8u-dev/pull/480/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=480&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8235834
  Stats: 264 lines in 2 files changed: 261 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/480.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/480/head:pull/480

PR: https://git.openjdk.org/jdk8u-dev/pull/480