FileDescriptor.java (position): New private field.

        * java/io/FileDescriptor.java (position): New private field.
        * java/io/natFileDescriptorPosix.cc (write): Up position.
        (setLength): Use and set position.
        (seek): Set position.
        (getFilePointer): Return position.
        (read): Up position.

From-SVN: r60869