[PATCH bpf-next v1] ARC: Add eBPF JIT support

[Shahab Vahedi]

Hello list,

I know this is not a small patch, but could someone skim over it?
If there's anything that I can do to make the review process easier,
please let me know.

I already intend to change the "commit message" in the following ways:

- Fix a typo: interpretor -> interpreter
- Mentioning the version of BPF CPU support: cpu=v4 (the latest)
- Saying a little bit about the performance improvement: 2-10 fold


Thank you in advance,
Shahab