RFR: 8158458: Update references from "1.9" to "9"

[Iris Clark]

Hi.

I'm taking another pass at replacing instances of "@since 1.9" with
"@since 9" and discovered a couple of jdk (AWT?) and langtools (DocTree)
files which need to be updated.  I've filed the following but to 
address this problem:

    8158458: Update references from "1.9" to "9" (closed code))
    https://bugs.openjdk.java.net/browse/JDK-8158458

This is the necessary diff, against jdk9/dev:

[/w/iclark/verona/javadoc/jdk]: 
diff -r 0bd06ec69c5b src/java.desktop/macosx/classes/com/apple/eawt/Application.java 
--- a/src/java.desktop/macosx/classes/com/apple/eawt/Application.java Wed Jun 01 11:22:06 2016 -0700 
+++ b/src/java.desktop/macosx/classes/com/apple/eawt/Application.java Wed Jun 01 17:40:09 2016 -0700 
@@ -372,7 +372,7 @@ 
  * Acceptable values are from 0 to 100, any other disables progress indication. 
  * 
  * @param value progress value 
- * @since 1.9 
+ * @since 9 
      */ 
     public void setDockIconProgress(final int value) { 
         iconHandler.setDockIconProgress(value); 

[/w/iclark/verona/javadoc/langtools]: 
diff -r 2d1a6b746310 src/jdk.compiler/share/classes/com/sun/source/doctree/HiddenTree.java 
--- a/src/jdk.compiler/share/classes/com/sun/source/doctree/HiddenTree.java Wed Jun 01 12:39:24 2016 +0100 
+++ b/src/jdk.compiler/share/classes/com/sun/source/doctree/HiddenTree.java Wed Jun 01 17:40:09 2016 -0700 
@@ -34,7 +34,7 @@ 
  * <p> 
  * @hidden 
  * 
- * @since 1.9 
+ * @since 9 
  */ 
 public interface HiddenTree extends BlockTagTree { 
     /**

Build and test runs show no regressions.

Thanks,
Iris