git: openjdk/jdk13u-dev: 8242010: Update IANA Language Subtag Registry to Version 2020-04-01

[Yuri Nesterenko]

Changeset: 9e591146
Author:    Yuri Nesterenko <yan at openjdk.org>
Date:      2021-05-19 12:13:35 +0000
URL:       https://git.openjdk.java.net/jdk13u-dev/commit/9e591146898c596b90071e5db66f64b08a73ca82

8242010: Update IANA Language Subtag Registry to Version 2020-04-01

Backport-of: 51a5e9ca3ce53ff75be4eb0aed2d55c109cf5094

! make/data/lsrdata/language-subtag-registry.txt
! make/jdk/src/classes/build/tools/generatelsrequivmaps/EquivMapsGenerator.java
! test/jdk/java/util/Locale/Bug7069824.java
! test/jdk/java/util/Locale/Bug8040211.java
! test/jdk/java/util/Locale/LSRDataTest.java