RFR: 7903731: Jextract should support macOS frameworks [v3]

[Maurizio Cimadamore]

On Thu, 2 Jan 2025 19:14:26 GMT, Nizar Benalla <nbenalla at openjdk.org> wrote:

>> Read the JBS issue for more detail.
>> 
>> This patch adds two new mac specific options, to make it easier to use frameworks and remove the need of a `compile_flags.txt` file. An exception is thrown if those options are used from an other platform, the error message is inspired from `jpackage`
>
> Nizar Benalla has updated the pull request incrementally with one additional commit since the last revision:
> 
>   use consistent spacing

We should make sure that users can specify both `-f` and `-l` and they are _both_ reflected in the generated sources (e.g. in case users would like to generate a single set of sources that work across multiple platforms).

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PR Comment: https://git.openjdk.org/jextract/pull/268#issuecomment-2573266731