<i18n dev> RFR: 8251317: Support for CLDR version 38

[Naoto Sato]

Hi,

Please review the changes for upgrading the CLDR data to version 38. The vast majority of the changes are simply the changes in CLDR upstream, and others are mainly test changes due to the locale data change.

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Commit messages:
 - Updated the version in `cldr.md` files
 - Merge branch 'master' into cldr
 - 8251317: Support for CLDR version 38

Changes: https://git.openjdk.java.net/jdk/pull/1279/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1279&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8251317
  Stats: 57338 lines in 209 files changed: 41958 ins; 4932 del; 10448 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1279.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1279/head:pull/1279

PR: https://git.openjdk.java.net/jdk/pull/1279