libndp: bump to version 1.6

Add hash for license file

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libndp/libndp.hash

@@ -1,2 +1,3 @@
 # Locally calculated
-sha256 42c0a8938d4302c72a42e2d954deef7e4903bb3974da6804a929a3cd0b5b6aa7  libndp-v1.5.tar.gz
+sha256 565d6c4167f83ec697c762ea002f23e8f0b00828d0749b1ce928f068543e5aad  libndp-v1.6.tar.gz
+sha256 dc626520dcd53a22f727af3ee42c770e56c97a64fe3adb063799d8ab032fe551  COPYING

package/libndp/libndp.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBNDP_VERSION = v1.5
+LIBNDP_VERSION = v1.6
 LIBNDP_SITE = $(call github,jpirko,libndp,$(LIBNDP_VERSION))
 LIBNDP_LICENSE = LGPL-2.1+
 LIBNDP_LICENSE_FILES = COPYING