*: add INSERTs to *.src files where appropriate

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/networking/libiproute/Kbuild.src b/networking/libiproute/Kbuild.src
index 5f9dd32..b0aa50a 100644
--- a/networking/libiproute/Kbuild.src
+++ b/networking/libiproute/Kbuild.src
@@ -7,6 +7,8 @@
 
 lib-y:=
 
+INSERT
+
 lib-$(CONFIG_SLATTACH) += \
 	utils.o