RFR: 8310643: Misformatted copyright messages in FFM

[Amit Kumar]

On Wed, 26 Jul 2023 15:43:12 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> This PR suggests updating some of the ill-formed copyright headers in the FFM API and the implementation and test thereof.
> 
> Some of the test files will have now the "classpath" exception. Is this correct?

Hi @minborg, 

Would you add below patch in this PR. This will add "classpath" exception copyright header for some files in java/lang/foreign dir. 

I have reverted the changes from my [PR](https://github.com/openjdk/jdk/pull/15070/commits/3958d9fe3a5fca3edebdf68ea7e082dd4768ce2f) as @mcimadamore  suggested. 

[java_lang_foreign_CP_exception.patch](https://github.com/openjdk/jdk/files/12196879/java_lang_foreign_CP_exception.patch)

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PR Comment: https://git.openjdk.org/jdk/pull/15042#issuecomment-1656095047