Comment 4 for bug 1936221

https://github.com/riscv/riscv-openjdk/tree/riscv-port-branch/src/hotspot/ builds without errors on Ubuntu Impish / HiFive unmatches in ca. 6 hours.

Next step is to package it in a ppa and test it.

Testing instructions are here: https://openjdk.java.net/groups/build/doc/testing.html