fixed import statements

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@19186 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/model/Run.java

@@ -43,6 +43,8 @@ import hudson.security.Permission;
 import hudson.security.PermissionGroup;
 import hudson.tasks.LogRotator;
 import hudson.tasks.Mailer;
+import hudson.tasks.BuildWrapper;
+import hudson.tasks.BuildStep;
 import hudson.tasks.test.AbstractTestResultAction;
 import hudson.util.IOException2;
 import hudson.util.LogTaskListener;