feat: promote riscv64-linux-musl from planned to verified cross target #853

Job	Run time
toolchain: musl + llvm	6m 53s
build + unit tests (linux x86_64, self-host)	11m 1s
toolchain: gcc (cold self-host)	5m 38s
integration: mcpp builds & runs xlings	8m 43s
	32m 15s

Navigation Menu