Add all jni APIs to bindings.rs.
Add all jni APIs to bindings.rs.

hyunsik/hdfs-rs,iron-kernel/hdfs-rs,fiji-flo/hdfs-rs,iron-kernel/hdfs-rs,iron-kernel/hdfs-rs,hyunsik/hdfs-rs,fiji-flo/hdfs-rs,fiji-flo/hdfs-rs,hyunsik/hdfs-rs