Fixed import

Author: mairbek

rxjava-core/src/main/java/rx/Observable.java

@@ -46,6 +46,7 @@
 import rx.operators.OperationSkip;
 import rx.operators.OperationSynchronize;
 import rx.operators.OperationTake;
+import rx.operators.OperationTakeLast;
 import rx.operators.OperationToObservableFuture;
 import rx.operators.OperationToObservableIterable;
 import rx.operators.OperationToObservableList;