add a mention to OS description string if running under a 64-bit Windows version

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53785 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/utils.cpp

@@ -1175,6 +1175,9 @@ wxString wxGetOsDescription()
                     str << _T(", ") << info.szCSDVersion;
                 }
                 str << _T(')');
+
+                if ( wxIsPlatform64Bit() )
+                    str << _(", 64-bit edition");
                 break;
         }
     }