RFR: 8278291: compiler/uncommontrap/TraceDeoptimizationNoRealloc.java fails with release VMs after JDK-8154011

[Jie Fu]

Hi all,

compiler/uncommontrap/TraceDeoptimizationNoRealloc.java fails with release VMs after JDK-8154011 due 'TraceDeoptimization' is diagnostic and must be enabled via -XX:+UnlockDiagnosticVMOptions.
Let's add `-XX:+UnlockDiagnosticVMOptions` to fix it.

Thanks.
Best regards,
Jie

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Commit messages:
 - 8278291: compiler/uncommontrap/TraceDeoptimizationNoRealloc.java fails after JDK-8154011

Changes: https://git.openjdk.java.net/jdk/pull/6721/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6721&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8278291
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6721.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6721/head:pull/6721

PR: https://git.openjdk.java.net/jdk/pull/6721