[15] RFR: 8239383: Support for Unicode 13.0

[naoto.sato at oracle.com]

Hello,

Please review the fix to the following issue:

https://bugs.openjdk.java.net/browse/JDK-8239383

Its CSR and proposed changeset are located at:

https://bugs.openjdk.java.net/browse/JDK-8239504
https://cr.openjdk.java.net/~naoto/8239383/webrev.00/

This updates java.lang.Character class to support Unicode Character 
Database 13.0, as well as incorporating ICU4J version 67.1, which 
corresponds to Unicode 13.0, for upgrading java.text.BiDi/Normalizer 
support. Grapheme support in java.util.regex package is also upgraded to 
13.0 level.

Naoto