oleaut32: Build language resource files separately.

Instead of including them from an other rc file.
diff --git a/dlls/oleaut32/resource.h b/dlls/oleaut32/resource.h
index 5c72c7e..550170a 100644
--- a/dlls/oleaut32/resource.h
+++ b/dlls/oleaut32/resource.h
@@ -20,6 +20,8 @@
 #ifndef WINE_OLEAUT32_RESOURCE_H
 #define WINE_OLEAUT32_RESOURCE_H
 
+#include <windef.h>
+
 /* Localised boolean text */
 #define IDS_TRUE  100
 #define IDS_FALSE 101