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

Make all changes to #include statements and build files.
diff --git a/src/rua/RUA_Gsm-map-IDNNS.c b/src/rua/RUA_Gsm-map-IDNNS.c
index bdf8880..75bdb96 100644
--- a/src/rua/RUA_Gsm-map-IDNNS.c
+++ b/src/rua/RUA_Gsm-map-IDNNS.c
@@ -4,7 +4,7 @@
  * 	found in "../../asn1/rua/RUA-IEs.asn"
  */
 
-#include <osmocom/osmo-iuh/rua/RUA_Gsm-map-IDNNS.h>
+#include <osmocom/rua/RUA_Gsm-map-IDNNS.h>
 
 static asn_per_constraints_t asn_PER_type_routingbasis_constr_2 GCC_NOTUSED = {
 	{ APC_CONSTRAINED,	 3,  3,  0l,  7l }	/* (0..7) */,