RFR: 8286744: failure_handler: dmesg command on macos fails to collect data due to permission issues [v2]

[Jaikiran Pai]

> Can I please get a review of this change which proposes to fix the failure handler command `dmesg` on macOS?
> 
> As noted in the JBS issue, the command currently fails with permission error. The commit in this PR uses `sudo` as suggested in the man pages of that command.
> 
> Tested locally on macOS by running:
> 
> 
> cd test/failure_handler
> make clean
> make test
> 
> Then checked the generated environment.html files for the dmesg command output. Looks fine after this change.

Jaikiran Pai has updated the pull request incrementally with one additional commit since the last revision:

  copyright year

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8703/files
  - new: https://git.openjdk.java.net/jdk/pull/8703/files/db538083..f85acab5

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8703&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8703&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8703.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8703/head:pull/8703

PR: https://git.openjdk.java.net/jdk/pull/8703