maint: Remove ';' at end of namespace declaration. * Backend.h, BaseControl.cc, BaseControl.h, ButtonControl.h, ButtonGroup.h, Canvas.cc, Canvas.h, CheckBoxControl.h, Container.cc, Container.h, ContextMenu.cc, ContextMenu.h, EditControl.cc, EditControl.h, Figure.cc, Figure.h, FigureWindow.cc, FigureWindow.h, GLCanvas.cc, GLCanvas.h, KeyMap.cc, KeyMap.h, ListBoxControl.cc, ListBoxControl.h, Logger.cc, Logger.h, Menu.cc, Menu.h, MenuContainer.h, Object.cc, Object.h, Panel.h, PopupMenuControl.cc, PopupMenuControl.h, PushButtonControl.cc, PushButtonControl.h, PushTool.h, QtHandlesUtils.cc, QtHandlesUtils.h, RadioButtonControl.h, SliderControl.cc, SliderControl.h, TextControl.cc, TextControl.h, TextEdit.cc, TextEdit.h, ToggleButtonControl.h, ToggleTool.h, ToolBar.cc, ToolBar.h, ToolBarButton.cc, __init_qt__.cc, __init_qt__.h, octave-gui.cc, build-env.h, build-env.in.cc, jit-util.h: Remove ';' at end of namespace declaration.

--- a/libgui/graphics/Object.h	Wed Aug 31 12:24:38 2016 -0700
+++ b/libgui/graphics/Object.h	Wed Aug 31 20:49:13 2016 -0700
@@ -101,7 +101,7 @@
     QObject* m_qobject;
   };
 
-}; // namespace QtHandles
+}
 
 #endif