Linux musl support

[linux-china]

For some cases, linux musl still important. How about linux_musl-aarch64?

    static {
        try {
            final Process p = new ProcessBuilder("/usr/bin/env", "sh", "-c", "ldd /usr/bin/env | grep -q musl").start();
            MUSL_LIBC = p.waitFor() == 0;
        } catch (final IOException | InterruptedException e) {
            MUSL_LIBC = false;
        }
    }

Thanks for your great work.