Booting Haiku’s RISC-V images

Thanks in large part to the hard work by X512 and everyone developing on Haiku, our nightly RISCV64 images are now functional.

RISC-V marks Haiku's first functional non-Intel/x86 port!

This is still crazy to me. This port has taken relatively little time, yet it marks a major milestone in Haiku's history.