Added win32-specific extern ignores.

appstub.mod/debugger_mt.stdio.win32.x

@@ -0,0 +1,5 @@
+WINBOOL IsIconic( HWND )!
+HWND GetForegroundWindow()!
+WINBOOL SetForegroundWindow( HWND )!
+WINBOOL ShowWindow( HWND ,int )!
+DWORD GetCurrentThreadId()!