Add support for agbcc -fprologue-bugfix

[WhenGryphonsFly]

Agbcc was recently updated to support a new compiler flag, -fprologue-bugfix (see pret/agbcc#64). This option represents a compiler patch that removed unnecessary push/pop instructions in leaf functions. This flag is necessary to support some games such as Pokémon Pinball: Ruby and Sapphire.

I am not 100% sure this is the proper forum for this issue, but given that (a) the fork of agbcc being used by decomp.me (https://github.com/ethteck/agbcc) does not have issues enabled, and (b) the owner of that fork is a maintainer here, I thought that this was a good of a place as any. If there is a better location to file this bug / feature request please let me know.

[ethteck]

Hi, thanks for the issue. I think it might be a good time to switch the site to use pret's fork. However, I wrote my own ci / packaging stuff, so I'm not sure simply changing out the url would work.

Someone will have to do a bit of work to make sure everything connects smoothly. If you're interested in giving it a shot, the first thing would be to set up the repo. Feel free to reach out in the discord if you have questions.

[ethteck]

Oh, I looked at this further and pret doesn't publish releases. Decomp.me needs a download link, so I think what needs to happen is either my fork needs pret's changes merged into it, or pret needs my release publishing merged into it.

[WhenGryphonsFly]

I had to update your workflow to replace some deprecated GitHub Actions, but I believe I have successfully merged your CI/packaging workflow into my fork of agbcc. With your permission, I can file a PR with these changes at pret's fork.

[ethteck]

Yeah, of course! glad my fork could help