Added missing file

Author: tdas

streaming/src/main/scala/org/apache/spark/streaming/api/python/PythonRDDFunction.java

@@ -0,0 +1,8 @@
+package org.apache.spark.streaming.api.python;
+
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.streaming.Time;
+
+public interface PythonRDDFunction {
+  JavaRDD<byte[]> call(JavaRDD<byte[]> rdd, long time);
+}