RFR: 8277627: Fix copyright years in some jvmci files [v2]

[Emanuel Peter]

On Mon, 10 Jan 2022 20:30:20 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Emanuel Peter has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Checked for latest edit year, added it into copyright where missing
>
> I suggest to look on history of these files changes and update second year accordingly.
> For example, `MemoryBarriers.java` was update last in 2016 based on 'Blame':
> https://github.com/openjdk/jdk/commit/1d60ce77a0e169da6f1564a294f842f10e29b699

Thanks Vladimir (@vnkozlov) for the review, I updated the patch according to your suggestion.

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PR: https://git.openjdk.java.net/jdk/pull/6985