RFR: 8308906: Make CIPrintCompilerName a diagnostic flag

[Ioi Lam]

Please review a very simple change. This makes it easy to see which JIT compiler is used to compile each method:


java -XX:+UnlockDiagnosticVMOptions -XX:+PrintCompilation -XX:+CIPrintCompilerName  -jar MyApp.java


CSR is not needed because this is a diagnostic VM option.

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Commit messages:
 - 8308906: Make CIPrintCompilerName a diagnostic flag

Changes: https://git.openjdk.org/jdk/pull/14161/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14161&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8308906
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/14161.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14161/head:pull/14161

PR: https://git.openjdk.org/jdk/pull/14161