Request approval to backport 8207159: update ICU to 62.1

[Johan Vos]

Hi Kevin,

I request approval to backport JBS-8207159
<https://bugs.openjdk.java.net/browse/JDK-8207159> to 11-dev (targeting
11.0.2):

JBS: https://bugs.openjdk.java.net/browse/JDK-8207159
Changeset:  http://hg.openjdk.java.net/openjfx/jfx-dev/rt/rev/20a8447c71c6

The changeset patch applies cleanly to 11-dev (tested building with
-PCOMPILE_WEBKIT=true on mac/linux)

- Johan