Add basic tracing lib files

tracetools/src/tracetools.c

@@ -0,0 +1,20 @@
+#include "tracetools/tracetools.h"
+
+#ifdef WITH_LTTNG
+#include "tp_call.h"
+#endif
+
+
+bool ros_trace_compile_status() {
+#ifdef WITH_LTTNG
+    return true;
+#else
+    return false;
+#endif
+}
+
+void ros_trace_rcl_init() {
+#ifdef WITH_LTTNG
+    tracepoint(ros2, rcl_init);
+#endif
+}