Reverse order of dependency list

Dependency list in modules.dep is kept in reverse order. Prepend to
list so all the other places treat it in the right order.
diff --git a/libkmod/libkmod-module.c b/libkmod/libkmod-module.c
index 4d85b76..7793062 100644
--- a/libkmod/libkmod-module.c
+++ b/libkmod/libkmod-module.c
@@ -180,7 +180,7 @@
 
 		DBG(ctx, "add dep: %s\n", path);
 
-		list = kmod_list_append(list, depmod);
+		list = kmod_list_prepend(list, depmod);
 		n++;
 	}