[jdk11u-dev] RFR: 8264593: debug.cpp utilities should be available in product builds.

[Goetz Lindenmaier]

I had to resolve one chunk.
I added NOT_PRODUCT around assignment to PrintVMMessages that is a debug flag and only in 11.

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Commit messages:
 - Backport e325a750ac795181f14b278fcd171170dbb3bbd5

Changes: https://git.openjdk.org/jdk11u-dev/pull/1409/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1409&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8264593
  Stats: 47 lines in 1 file changed: 3 ins; 13 del; 31 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1409.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1409/head:pull/1409

PR: https://git.openjdk.org/jdk11u-dev/pull/1409