Getting BPF exceptions RISC-V JIT support

Ok, so I recently landed this: damn das a patch I did this because I saw this and I then wanted to add arm64 support to it. But Puranjay added it so fast that my dumb head had no time at all to add this out. Then, I tried to add riscv support for it, but once I got testing ready, I realised that the selftests did not work at all because exceptions, which were present in the tests I was running…