RFR: 8275775: VM.metaspace prints flag 'f' for classes that overrided finalize()

[Yi Yang]

Some customers want to observe which loaded classes have overridden the finalize() method. I found that VM.metaspace can output detailed classes. It seems feasible to add 'f' flag to it. With this patch, I found that ZipFileSystem left a finalize after applying this patch, which was obsolete 5 years ago, maybe we should remove it?

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Commit messages:
 - 8275775 VM.metaspace prints flag 'f' for classes that overrided finalize()

Changes: https://git.openjdk.java.net/jdk/pull/6075/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6075&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8275775
  Stats: 8 lines in 2 files changed: 2 ins; 3 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6075.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6075/head:pull/6075

PR: https://git.openjdk.java.net/jdk/pull/6075