Add riscv64 support (#14601)
Add riscv64 support (#14601)

In riscv64, the `syscall.Uname` function will return a uint8 slice.

    func main() {
      var buf syscall.Utsname
      fmt.Printf("Buffer Type: %T\n", buf.Release)
    }

    output:
      Buffer Type: [65]uint8

This is tested in the Arch Linux RISC-V 64 QEMU environment.

Signed-off-by: Avimitin <f652ac90ac368f6160016047ac42d5eca944cb5b@gmail.com>
krisis/minio,minio/minio,balamurugana/minio,vadmeste/minio,donatello/minio,vadmeste/minio,minio/minio,balamurugana/minio,donatello/minio,krisis/minio