iproute2: drop libbsd dependency

As the usage of libbsd is no longer limited to glibc, prevent libbsd
being picked up by removing the dependency on libbsd.

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

package/network/utils/iproute2/patches/200-drop_libbsd_dependency.patch

@@ -0,0 +1,19 @@
+--- a/configure
++++ b/configure
+@@ -299,14 +299,8 @@ EOF
+     if $CC -I$INCLUDE -o $TMPDIR/strtest $TMPDIR/strtest.c >/dev/null 2>&1; then
+ 	echo "no"
+     else
+-	if ${PKG_CONFIG} libbsd --exists; then
+-		echo 'CFLAGS += -DHAVE_LIBBSD' `${PKG_CONFIG} libbsd --cflags` >>$CONFIG
+-		echo 'LDLIBS +=' `${PKG_CONFIG} libbsd --libs` >> $CONFIG
+-		echo "no"
+-	else
+-		echo 'CFLAGS += -DNEED_STRLCPY' >>$CONFIG
+-		echo "yes"
+-	fi
++	echo 'CFLAGS += -DNEED_STRLCPY' >>$CONFIG
++	echo "yes"
+     fi
+     rm -f $TMPDIR/strtest.c $TMPDIR/strtest
+ }