RFR: 8305107: Emoji related binary properties in RegEx

[Naoto Sato]

Introducing new regex constructs that match those 6 new Unicode Emoji properties implemented in the `Character` class (https://bugs.openjdk.org/browse/JDK-8303018). A corresponding CSR has been drafted.

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Commit messages:
 - 8305107: Emoji related binary properties in RegEx

Changes: https://git.openjdk.org/jdk/pull/13314/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13314&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305107
  Stats: 163 lines in 3 files changed: 51 ins; 1 del; 111 mod
  Patch: https://git.openjdk.org/jdk/pull/13314.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13314/head:pull/13314

PR: https://git.openjdk.org/jdk/pull/13314