scrobj: Use --prefer-native instead of DLL_WINE_PREATTACH.

dlls/scrobj/Makefile.in

 MODULE    = scrobj.dll
 IMPORTS   = uuid urlmon ole32 oleaut32 xmllite advapi32
 
-EXTRADLLFLAGS = -mno-cygwin
+EXTRADLLFLAGS = -mno-cygwin -Wb,--prefer-native
 
 C_SRCS = \
 	scrobj.c

dlls/scrobj/scrobj.c

@@ -2360,8 +2360,6 @@ BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, void *reserved)
 
     switch (reason)
     {
-        case DLL_WINE_PREATTACH:
-            return FALSE;    /* prefer native version */
         case DLL_PROCESS_ATTACH:
             DisableThreadLibraryCalls(hinst);
             scrobj_instance = hinst;