Remove osmo-iuh subdir level from include/ (2/2)

Make all changes to #include statements and build files.
diff --git a/include/osmocom/rua/RUA_Gsm-map-IDNNS.h b/include/osmocom/rua/RUA_Gsm-map-IDNNS.h
index 04d2773..4d59481 100644
--- a/include/osmocom/rua/RUA_Gsm-map-IDNNS.h
+++ b/include/osmocom/rua/RUA_Gsm-map-IDNNS.h
@@ -12,7 +12,7 @@
 
 /* Including external dependencies */
 #include <BOOLEAN.h>
-#include <osmocom/osmo-iuh/rua/RUA_RoutingParameter.h>
+#include <osmocom/rua/RUA_RoutingParameter.h>
 #include <constr_SEQUENCE.h>
 #include <constr_CHOICE.h>