Building on macos location of dylib differs from expected.

[niloch]

On intel i7 2015 MacBook Pro running HighSierra 10.13.5

Mismatch between "os.arch" in sbt.build vs NativeUtils.java path.

In sbt.build os.arch = x86_64.

Building beanpiece libsentencepiece.dylib is placed in /osx/x86_64/libsentencepiece.dylib.

However at runtime when NativeUtils.java attempts to load the appropriate libary it searches in /osx/i386/libsentencepiece.dylib

in NativeUtils path returns i386 due to

private static Architecture architecture() {
        String arch = System.getProperty("os.arch").toLowerCase(Locale.ENGLISH);
         // arch = "x86_64"
        if (arch.contains("ppc")) {
            return Architecture.PPC;
        } else if (arch.contains("i386") || arch.contains("x86")) {
            return Architecture.I386;
        } else if (arch.contains("amd64") || arch.contains("x86_64")) {
            return Architecture.AMD64;
        } else {
            throw new IllegalArgumentException("Unsupported architecture: " + arch);
        }
    }