RFR: 8265148: StackWatermarkSet being updated during AsyncGetCallTrace

[Leonid Mesnik]

8265148: StackWatermarkSet being updated during AsyncGetCallTrace

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Commit messages:
 - space removed.
 - 8265148: StackWatermarkSet being updated during AsyncGetCallTrace

Changes: https://git.openjdk.java.net/jdk/pull/4217/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4217&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265148
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4217.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4217/head:pull/4217

PR: https://git.openjdk.java.net/jdk/pull/4217