RFR: 8281507: Two javac tests have bad jtreg `@clean` tags [v2]

[Aleksey Shipilev]

On Wed, 9 Feb 2022 23:16:05 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

>> Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Use clean * instead
>
> Suggest using `@clean *` to remove all previously compiled class files for the test. This seems closest to the original intent.

@jonathan-gibbons, please ack this?

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PR: https://git.openjdk.java.net/jdk/pull/7398