remove gcc warnings

phy_init_lte_ue_signal was renamed init_lte_ue_signal in openair1/PHY/INIT/defs.h
maybe it's the opposite that should have been done?

Functions used in one file and defined in another may have been
declared in the wrong header file.

openair3/GTPV1-U/gtpv1u_eNB_defs.h

@@ -33,6 +33,8 @@
 #ifndef GTPV1U_ENB_DEFS_H_
 #define GTPV1U_ENB_DEFS_H_
 
+#include "NwGtpv1u.h"
+
 #define GTPV1U_UDP_PORT (2152)
 #define GTPV1U_BEARER_OFFSET 3