Fix typo

lib/antenna_lib.cpp

@@ -9,7 +9,7 @@
 #include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <strings.h>
+#include <string.h>
 #include "antenna_lib.h"
 
 // Global variables for passing information. Ugly style but doesn't