RFR: 8306006: strace001.java fails due to unknown methods on stack [v2]

[Fredrik Bredberg]

> Added the missing java.lang.Thread.beforeSleep and java.lang.afterSleep to expectedSystemTrace.
> Tested on my local machine.

Fredrik Bredberg has updated the pull request incrementally with two additional commits since the last revision:

 - Updated after review
 - Added java.util.concurrent.TimeUnit.toNanos to expectedSystemTrace

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Changes:
  - all: https://git.openjdk.org/jdk/pull/13476/files
  - new: https://git.openjdk.org/jdk/pull/13476/files/6d7f9163..3739314e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13476&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13476&range=00-01

  Stats: 56 lines in 10 files changed: 6 ins; 12 del; 38 mod
  Patch: https://git.openjdk.org/jdk/pull/13476.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13476/head:pull/13476

PR: https://git.openjdk.org/jdk/pull/13476