init commit

Author: lianhuiwang

…g/apache/spark/unsafe/bitset/BitSet.java …k/util/collection/unsafe/map/BitSet.javaunsafe/src/main/java/org/apache/spark/unsafe/bitset/BitSet.java renamed to core/src/main/java/org/apache/spark/util/collection/unsafe/map/BitSet.java unsafe/src/main/java/org/apache/spark/unsafe/bitset/BitSet.java renamed to core/src/main/java/org/apache/spark/util/collection/unsafe/map/BitSet.java

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.unsafe.bitset;
+package org.apache.spark.util.collection.unsafe.map;
 
 import org.apache.spark.unsafe.array.LongArray;
 import org.apache.spark.unsafe.memory.MemoryBlock;

…e/spark/unsafe/bitset/BitSetMethods.java …collection/unsafe/map/BitSetMethods.javaunsafe/src/main/java/org/apache/spark/unsafe/bitset/BitSetMethods.java renamed to core/src/main/java/org/apache/spark/util/collection/unsafe/map/BitSetMethods.java unsafe/src/main/java/org/apache/spark/unsafe/bitset/BitSetMethods.java renamed to core/src/main/java/org/apache/spark/util/collection/unsafe/map/BitSetMethods.java

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.unsafe.bitset;
+package org.apache.spark.util.collection.unsafe.map;
 
 import org.apache.spark.unsafe.PlatformDependent;