RFR: 8263854: Use the blessed modifier in jdk.internal.jvmstat

[Alex Blewitt]

8263854: Use the blessed modifier in jdk.internal.jvmstat

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Commit messages:
 - 8263854: Use the blessed modifier in jdk.internal.jvmstat

Changes: https://git.openjdk.java.net/jdk/pull/3252/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3252&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263854
  Stats: 78 lines in 5 files changed: 0 ins; 0 del; 78 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3252.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3252/head:pull/3252

PR: https://git.openjdk.java.net/jdk/pull/3252