iptables: set nonshared flag

this makes sure that offloading support is properly included for v4.14 targets.

Signed-off-by: John Crispin <[email protected]>

package/network/utils/iptables/Makefile

@@ -18,6 +18,7 @@ PKG_SOURCE_VERSION:=c16bdec15137b241586310d0e61bc88cc3726004
 PKG_MIRROR_HASH:=72e4bec94a56dd600097846c773e1074ff705e38f800ef221db646c064371a53
 
 PKG_FIXUP:=autoreconf
+PKG_FLAGS:=nonshared
 
 PKG_INSTALL:=1
 PKG_BUILD_PARALLEL:=1