Proposal: Convert all patches to mail-formatted patches

[kubanrob]

Editing or updating patches in the patch directory is unnecessarily hard, especially if a patch somewhere in the middle should to be added or updated.

It would be much easier if the patches would be mail-formatted (some of them already are).

That way, you could:

1. checkout the appropriate musl version ( currently v1.1.19)
2. apply the patches to the musl git repository (git am)
3. make the changes to the git history
4. export the new versions with git format-patch v1.1.19

Currently, a similar workflow is possible by manually applying non-mail-formatted patches with git apply and then committing each of these changes. However, converting back to the original patch format is unnecessarily hard.

Other points to consider:

• Applying the patches into a git repository is also a useful tool for reviewing the patches.
• The mail-formatted patches are already handled well by the Unikraft build system.