Investigate recompiling libultra from ultralib

[Mr-Wiseguy]

The n32 ABI is more efficient as it allows the use of 8 registers for passing arguments to functions instead of just 4. It also allows using the native 64 bit operations that the N64 supports. Compiling libultra under a modern compiler instead of a 25 year old one might also net some performance gain as well.

This task will be a very large undertaking and may not yield a large enough performance boost to warrant that amount of work, so it's not high priority.

[Mr-Wiseguy]

n32 is not better than o32 from my testing, but eabi32 may be worth it and just having the option to pick an ABI in the makefile would be nice. We should still include recompiled libultra regardless because it's currently using codegen from a 25 year old compiler.

[gheskett]

Moved to 2.2 but realistically this issue should probably be closed if nobody else thinks they can take this on.

[thecozies]

@gheskett I would be able to probably