RFR: 8292562: (fc) Use copy_file_range in FileChannel::transferTo on Linux [v9]

[Alan Bateman]

On Thu, 25 Aug 2022 18:37:43 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

>> Add `copy_file_range(2)` to the native Linux implementation of `FileChannel::transferTo`.
>
> Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8292562: "Really" remove transferFrom test; remove @requires Linux

The test no longer needs to build jdk.test.lib.Platform, otherwise the update looks okay.

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Marked as reviewed by alanb (Reviewer).

PR: https://git.openjdk.org/jdk/pull/9925