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_RUA-PDU.h b/include/osmocom/rua/RUA_RUA-PDU.h
index 5feaa01..7f5bdb7 100644
--- a/include/osmocom/rua/RUA_RUA-PDU.h
+++ b/include/osmocom/rua/RUA_RUA-PDU.h
@@ -11,9 +11,9 @@
 #include <asn_application.h>
 
 /* Including external dependencies */
-#include <osmocom/osmo-iuh/rua/RUA_InitiatingMessage.h>
-#include <osmocom/osmo-iuh/rua/RUA_SuccessfulOutcome.h>
-#include <osmocom/osmo-iuh/rua/RUA_UnsuccessfulOutcome.h>
+#include <osmocom/rua/RUA_InitiatingMessage.h>
+#include <osmocom/rua/RUA_SuccessfulOutcome.h>
+#include <osmocom/rua/RUA_UnsuccessfulOutcome.h>
 #include <constr_CHOICE.h>
 
 #ifdef __cplusplus