add ~riscv keyword
USE tests started on Tue Feb 21 03:59:37 AM -00 2023 FEATURES=' test' USE='' succeeded for =dev-cpp/rapidyaml-0.5.0 USE='' succeeded for =dev-cpp/rapidyaml-0.5.0 FEATURES=' test' USE='' succeeded for =dev-lang/jsonnet-0.19.1 USE='-custom-optimization doc examples -python' succeeded for =dev-lang/jsonnet-0.19.1
riscv done all arches done