[jdk16] RFR: 8258404: Restore stacktrace reuse after 8258094

[Markus Grönlund]

Greetings,

a tiny adjustment to restore the possibility of capitalizing on a cached stacktrace.

Thanks
Markus

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Commit messages:
 - move after LeakProfiler::sample for reuse

Changes: https://git.openjdk.java.net/jdk16/pull/23/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk16&pr=23&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8258404
  Stats: 3 lines in 1 file changed: 2 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk16/pull/23.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk16 pull/23/head:pull/23

PR: https://git.openjdk.java.net/jdk16/pull/23