knot: update to 1.5.1.

Signed-off-by: Daniel Salzman <daniel.salzman@nic.cz>

net/knot/Makefile

@@ -8,13 +8,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=knot
-PKG_VERSION:=1.5.0
+PKG_VERSION:=1.5.1
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
 PKG_SOURCE_URL:=https://secure.nic.cz/files/knot-dns/
-PKG_MD5SUM:=d677de99c19afea3b1e8ef075a9d5a8b
+PKG_MD5SUM:=4109648a538d35babea8379993c34996
 
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)
 PKG_BUILD_PARALLEL:=1