add q_rr to tc Makefile

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
diff --git a/tc/Makefile b/tc/Makefile
index 22cd437..a715566 100644
--- a/tc/Makefile
+++ b/tc/Makefile
@@ -11,6 +11,7 @@
 TCMODULES += q_prio.o
 TCMODULES += q_tbf.o
 TCMODULES += q_cbq.o
+TCMODULES += q_rr.o
 TCMODULES += q_netem.o
 TCMODULES += f_rsvp.o
 TCMODULES += f_u32.o