Update header guards icmpv6echo.h
-#ifndef __ICMPv6ECHO_H
-#define __ICMPv6ECHO_H
+#ifndef OPENWSN_ICMPv6ECHO_H
+#define OPENWSN_ICMPv6ECHO_H
/**
\addtogroup IPv6
@@ -37,4 +37,4 @@ void icmpv6echo_setIsReplyEnabled(bool isEnabled);
\}
*/
-#endif
+#endif /* OPENWSN_ICMPV6ECHO_H */
