[CFT] Switch spike port to upstream

[Li-Wen Hsu]

Hello,

I'd like to switch the emulators/riscv-isa-sim port to upstream 1.0.0
version, the shar file is available at
https://gist.github.com/743286ead8c33bed61764d80b3a008ca

Please help to test/suggest/comment.

Thanks,
Li-Wen