HADOOP-13072. WindowsGetSpaceUsed constructor should be public (Vinayakumar B via cmccabe)

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/WindowsGetSpaceUsed.java

@@ -32,7 +32,8 @@ import java.io.IOException;
 public class WindowsGetSpaceUsed extends CachingGetSpaceUsed {
 
 
-  WindowsGetSpaceUsed(CachingGetSpaceUsed.Builder builder) throws IOException {
+  public WindowsGetSpaceUsed(CachingGetSpaceUsed.Builder builder)
+      throws IOException {
     super(builder.getPath(), builder.getInterval(), builder.getInitialUsed());
   }