fix rfsim ue initial sync and legacy OAI C struct syntax

common/utils/minimal_stub.c

@@ -0,0 +1,4 @@
+int T_stdout;
+
+void exit_function(const char *file, const char *function, const int line, const char *s) {
+}

common/utils/simple_executable.h

@@ -0,0 +1,37 @@
+#ifndef __SIMPLE_EXE_H__
+#define __SIMPLE_EXE_H__
+#ifndef __USE_GNU
+#define __USE_GNU
+#endif
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#include <stdio.h>
+#include <pthread.h>
+#include <sched.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <sys/time.h>
+#include <stdint.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <common/utils/assertions.h>
+#include <common/utils/LOG/log.h>
+#include "common_lib.h"
+
+#ifdef T
+  #undef T
+  #define T(...)
+#endif
+
+#endif