Import patch iproute2-hz

(Logical change 1.159)
diff --git a/lib/utils.c b/lib/utils.c
index cd9567b..73ce865 100644
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -384,6 +384,13 @@
 	return HZ;
 }
 
+int __iproute2_user_hz_internal;
+
+int __get_user_hz(void)
+{
+	return sysconf(_SC_CLK_TCK);
+}
+
 const char *rt_addr_n2a(int af, int len, const void *addr, char *buf, int buflen)
 {
 	switch (af) {