Fix list of mingw dlls to deploy

Change-Id: I4cf9a032ce7594bb0d8f3fad28a03145937b01cf
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>

doc/src/platforms/windows.qdoc

@@ -802,9 +802,9 @@
                \li MSVCP100.DLL - The C++ runtime
            \endlist
         \li \list
-               \li MINGWM10.DLL - The MinGW run-time
+               \li LIBWINPTHREAD-1.DLL
                \li LIBGCC_S_DW2-1.DLL
-               \li LIBSTDC++-6.dll
+               \li LIBSTDC++-6.DLL
            \endlist
     \endtable