Generate binaries for riscv64 targets

riscv-rt/assemble.sh

@@ -9,6 +9,10 @@ rm -f bin/*.a
 
 riscv64-unknown-elf-gcc -c -mabi=ilp32 -march=rv32imac asm.S -o bin/$crate.o
 ar crs bin/riscv32imac-unknown-none-elf.a bin/$crate.o
-cp bin/riscv32imac-unknown-none-elf.a bin/riscv32imc-unknown-none-elf.a
+ar crs bin/riscv32imc-unknown-none-elf.a bin/$crate.o
+
+riscv64-unknown-elf-gcc -c -mabi=lp64 -march=rv64imac asm.S -o bin/$crate.o
+ar crs bin/riscv64imac-unknown-none-elf.a bin/$crate.o
+ar crs bin/riscv64gc-unknown-none-elf.a bin/$crate.o
 
 rm bin/$crate.o