RFR: 8378034: Add licenses for gcc 14.2.0 [v2]

[Kevin Rushforth]

On Tue, 17 Feb 2026 00:17:17 GMT, Ambarish Rapte <arapte at openjdk.org> wrote:

>> Kevin Rushforth has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Only deliver gcc.md on Linux
>
> lgtm..

@arapte Can you re-review? I pushed a simple build change to only deliver this new `gcc.md` third-party readme on Linux.

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PR Comment: https://git.openjdk.org/jfx/pull/2076#issuecomment-3920893611