RFR: JDK-8147913: Some runtime/CompressedOops tests fail on ARM64 product builds

[Bengt Rutisson]

Hi everyone,

Could I have a couple of reviews for this fix to enable some metaspace 
logging in product mode?

http://cr.openjdk.java.net/~brutisso/8147913/webrev.00/
https://bugs.openjdk.java.net/browse/JDK-8147913

Before the GC changes for unified logging, this logging used to be 
guarded by:

  if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose))

Verbose was always false in product builds but PrintCompressedOopsMode 
was a diagnostic flag and thus the logging was available in product builds.

The proposed change makes the log output available in product builds on 
trace level.

Thanks,
Bengt