RFR: 8278923: Document Klass::is_loader_alive [v2]

[Ioi Lam]

On Thu, 7 Jul 2022 13:01:38 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> This trivial change just adds a comment to Klass::is_loader_alive.
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix typo.

LGTM

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Marked as reviewed by iklam (Reviewer).

PR: https://git.openjdk.org/jdk/pull/9400