Add doc for wxCliboard::Get

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71400 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/clipbrd.h

@@ -174,5 +174,11 @@ public:
         platforms.
     */
     virtual void UsePrimarySelection(bool primary = false);
+
+    /**
+       Returns the global instance (wxTheClipboard) of the clipboard object.
+    */
+    static wxClipboard *Get();
+
 };