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

Make all changes to #include statements and build files.
diff --git a/include/osmocom/ranap/RANAP_SRVCC-Information.h b/include/osmocom/ranap/RANAP_SRVCC-Information.h
index dcfa755..ef851b1 100644
--- a/include/osmocom/ranap/RANAP_SRVCC-Information.h
+++ b/include/osmocom/ranap/RANAP_SRVCC-Information.h
@@ -12,7 +12,7 @@
 
 /* Including external dependencies */
 #include <BIT_STRING.h>
-#include <osmocom/osmo-iuh/ranap/RANAP_IE-Extensions.h>
+#include <osmocom/ranap/RANAP_IE-Extensions.h>
 #include <constr_SEQUENCE.h>
 
 #ifdef __cplusplus