Add necessary time header include to avalon driver.
diff --git a/driver-avalon.c b/driver-avalon.c
index f274314..91fa93a 100644
--- a/driver-avalon.c
+++ b/driver-avalon.c
@@ -20,6 +20,7 @@
#include <ctype.h>
#include <dirent.h>
#include <unistd.h>
+#include <time.h>
#ifndef WIN32
#include <sys/select.h>
#include <termios.h>