Fix current builds (zlib 1.2.11 cannot be downloaded, busybox patch not applied)

[tlaurion]

• zlib 1.2.12 release is not respecting cross compiling. We save current builds with old zlib.
  • 1.2.11 disappeared from servers: taking another archive link, same hash.
• busybox 1.32.0 was not patched with 1.28.0 patch. Renaming patch so that its applied in fresh builds.

[tlaurion]

@MrChromebox @osresearch : please approve.

We would need a release and downloadable roms with the result of this merged commit, prior of thinking of moving out of the current buildsystem and replace it with https://github.com/osresearch/linux-builder (which is a PoC now, but fixed all reproducibility issues 👍 !)

[MrChromebox]

would you mind rewording the commit msg to something like modules/zlib: fix download URL to make it more obvious what the patch is doing? and then make the busybox patch rename a separate commit