[jdk11u-dev] RFR: 8316178: Better diagnostic header for CodeBlobs

[Aleksey Shipilev]

Semi-clean backport to improve JVM diagnostics. Does not apply cleanly because context is quite a bit different in JDK 11.

Additional testing:
 - [ ] Eyeballing the VM output

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Commit messages:
 - Backport d575968b4bde74bd557cb84e89f0fa0f96b04087

Changes: https://git.openjdk.org/jdk11u-dev/pull/2137/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2137&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8316178
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2137.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2137/head:pull/2137

PR: https://git.openjdk.org/jdk11u-dev/pull/2137