Don't link shlwapi directly.

For MSVC use #pragma comment to link shlwapi, and for MinGW use dynamic
loading of this library.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77635 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/taskbarbutton.h

@@ -20,7 +20,8 @@ namespace {
 class WXDLLIMPEXP_FWD_CORE ITaskbarList3;
 }
 
-class WXDLLIMPEXP_CORE wxTaskBarButtonImpl : public wxTaskBarButton {
+class WXDLLIMPEXP_CORE wxTaskBarButtonImpl : public wxTaskBarButton
+{
 public:
     virtual ~wxTaskBarButtonImpl();