RFR: 8278532: Fix some typos in compiler comments [v2]

[Jie Fu]

On Fri, 10 Dec 2021 04:19:55 GMT, Hamlin Li <mli at openjdk.org> wrote:

>> This is a trivial patch to fix some typos in C1 comments.
>
> Hamlin Li has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix typo in C2 too

Looks good and trivial.

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Marked as reviewed by jiefu (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/6793