8174699: Fix @since in module-info.java in dev/nashorn repo

Reviewed-by: jlaskey

nashorn/src/jdk.dynalink/share/classes/module-info.java

@@ -216,6 +216,8 @@
  * language runtime B gets passed to code from language runtime A, the linker
  * from B will get a chance to link the call site in A when it encounters the
  * object from B.
+ *
+ * @since 9
  */
 module jdk.dynalink {
     requires java.logging;

nashorn/src/jdk.scripting.nashorn.shell/share/classes/module-info.java

@@ -25,6 +25,8 @@
 
 /**
  * Nashorn shell module
+ *
+ * @since 9
  */
 module jdk.scripting.nashorn.shell {
     requires java.desktop;

nashorn/src/jdk.scripting.nashorn/share/classes/module-info.java

@@ -89,6 +89,8 @@ arrays and back, and so on.
 <h2>Other non-standard built-in objects</h2>
 In addition to {@code Java}, Nashorn also exposes some other non-standard built-in objects:
 {@code JSAdapter}, {@code JavaImporter}, {@code Packages}
+
+@since 9
  */
 module jdk.scripting.nashorn {
     requires java.logging;