conditional build of netem

(Logical change 1.43)
diff --git a/tc/Makefile b/tc/Makefile
index 546c5df..9e0952b 100644
--- a/tc/Makefile
+++ b/tc/Makefile
@@ -23,7 +23,10 @@
   LDLIBS += -latm
 endif
 
-TCMODULES += q_netem.o
+ifeq ($(TC_CONFIG_NETEM),y)
+	TCMODULES += q_netem.o
+endif
+
 TCMODULES += q_csz.o
 TCMODULES += q_htb.o
 TCMODULES += q_hpfq.o