[11u] RFR 8238284: [macos] Zero VM build fails due to an obvious typo

[Vladimir Kempik]

Hello
Please review this backport of JDK-8238284 to jdk11u

The patch didn’t apply cleanly. Original 8238284 fixed two issues in jdk15:
JDK-8237437 - since jdk14
JDK-8165929 - since jdk11

Jdk11 only has 8165929 so only part of original fix needs to be backported to jdk11, that part applies cleanly.

This is part2 out of 3 fixes needed to fix zero vm on macos.

Fix has also part for linux but it wasn’t affected in my testing.

Risks are low because the patch just adds const keyword to some vars for zerovm

The bug: https://bugs.openjdk.java.net/browse/JDK-8238284
The webrev: http://cr.openjdk.java.net/~vkempik/8238284/webrev.11u.00/
Original review https://mail.openjdk.java.net/pipermail/hotspot-dev/2020-January/040681.html
Other two mentioned bugs: https://bugs.openjdk.java.net/browse/JDK-8234737 ,  https://bugs.openjdk.java.net/browse/JDK-8165929

Thanks, Vladimir