git: openjdk/jdk: 8323159: Consider adding some text re. memory zeroing in Arena::allocate

[Per Minborg]

Changeset: f5b757ce
Author:    Per Minborg <pminborg at openjdk.org>
Date:      2024-01-15 16:07:56 +0000
URL:       https://git.openjdk.org/jdk/commit/f5b757ced6b672010ea10575d644d3f9d1728923

8323159: Consider adding some text re. memory zeroing in Arena::allocate

Reviewed-by: mcimadamore, jvernee

! src/java.base/share/classes/java/lang/foreign/Arena.java
! test/jdk/java/foreign/TestScope.java