- Changed PosixFileFunctions to pass Strings to JNI methods, and use java_to_char() to encode as C char string.

- Don't need to pass system encoding back up to Java as part of system info.

src/main/java/net/rubygrapefruit/platform/internal/MutableSystemInfo.java

@@ -5,7 +5,6 @@ import net.rubygrapefruit.platform.SystemInfo;
 public class MutableSystemInfo implements SystemInfo {
     public String osName;
     public String osVersion;
-    public String characterEncoding;
     public String machineArchitecture;
 
     public String getKernelName() {