RFR: 8364197: G1: Sort G1 mutex locks by name and group them together

[Thomas Schatzl]

Hi all,

  please review this change to put together G1 mutex definitions/declarations and sort them. That makes it easier for me to verify changes in that area.

Testing: local compilation

Thanks,
  Thomas

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Commit messages:
 - 8364197

Changes: https://git.openjdk.org/jdk/pull/26508/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26508&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8364197
  Stats: 44 lines in 2 files changed: 21 ins; 15 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/26508.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26508/head:pull/26508

PR: https://git.openjdk.org/jdk/pull/26508