RFR: 8312626: Resolve multiple definition of 'start_timer' when statically linking JDK native libraries with user code [v4]

[Jiangli Zhou]

> Please review the simple fix that changes start|stop_timer to static.

Jiangli Zhou has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:

 - Merge branch 'master' into JDK-8312626
 - Merge branch 'master' into JDK-8312626
 - Merge branch 'master' into JDK-8312626
 - Change 'start|stop_timer' to be static.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/15006/files
  - new: https://git.openjdk.org/jdk/pull/15006/files/887760f0..363f2884

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15006&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15006&range=02-03

  Stats: 1328 lines in 59 files changed: 850 ins; 208 del; 270 mod
  Patch: https://git.openjdk.org/jdk/pull/15006.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15006/head:pull/15006

PR: https://git.openjdk.org/jdk/pull/15006