RFR: 8286088: add comment to InstallAsyncExceptionHandshake destructor [v2]

[Daniel D.Daugherty]

> A trivial fix to add comment to InstallAsyncExceptionHandshake destructor.

Daniel D. Daugherty has updated the pull request incrementally with one additional commit since the last revision:

  dholmes CR - simplify the comment.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8522/files
  - new: https://git.openjdk.java.net/jdk/pull/8522/files/12e2e98a..ae239ce2

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8522&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8522&range=00-01

  Stats: 3 lines in 1 file changed: 0 ins; 2 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8522.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8522/head:pull/8522

PR: https://git.openjdk.java.net/jdk/pull/8522