Add “ends here” footers

They are useless but package-lint requires them.

pw-access.el

@@ -253,3 +253,5 @@ Note this interface may not work with all PipeWire versions.")
                 "0" property (format "{ \"name\": \"%s\" }" node-name)))
 
 (provide 'pw-access)
+
+;;; pw-access.el ends here

pw-lib.el

@@ -314,3 +314,5 @@ otherwise set the current default sink or source."
      (error "Cannot set this kind of object as default."))))
                            
 (provide 'pw-lib)
+
+;;; pw-lib.el ends here

pw-ui.el

@@ -404,3 +404,5 @@ applied on some of them or the buffer:
   (pipewire-mode))
 
 (provide 'pw-ui)
+
+;;; pw-ui.el ends here