8305206: Add @spec tags in java.base/java.* (part 1)

Reviewed-by: alanb, naoto, darcy, lancea, dfuchs, iris, mchung

src/java.base/share/classes/java/util/jar/Attributes.java

@@ -55,6 +55,7 @@ import sun.util.logging.PlatformLogger;
  * <p>This map and its views have a predictable iteration order, namely the
  * order that keys were inserted into the map, as with {@link LinkedHashMap}.
  *
+ * @spec jar/jar.html JAR File Specification
  * @author  David Connelly
  * @see     Manifest
  * @since   1.2
@@ -446,6 +447,8 @@ public class Attributes implements Map<Object,Object>, Cloneable {
      * and will be UTF8-encoded when written to the output stream.  See the
      * <a href="{@docRoot}/../specs/jar/jar.html">JAR File Specification</a>
      * for more information about valid attribute names and values.
+     *
+     * @spec jar/jar.html JAR File Specification
      */
     public static class Name {
         private final String name;

src/java.base/share/classes/java/util/jar/Manifest.java

@@ -44,6 +44,7 @@ import sun.security.util.SecurityProperties;
  * <a href="{@docRoot}/../specs/jar/jar.html">
  * Manifest format specification</a>.
  *
+ * @spec jar/jar.html JAR File Specification
  * @author  David Connelly
  * @see     Attributes
  * @since   1.2

src/java.base/share/classes/java/util/jar/package-info.java

@@ -44,6 +44,7 @@
  *       Manifest and Signature Specification</a> - The manifest format specification.
  * </ul>
  *
+ * @spec jar/jar.html JAR File Specification
  * @since 1.2
  */
 package java.util.jar;