kexec-tools: update URL

Update URL variable to reflect switch to Github for development
The old URL returns HTTP 404

Signed-off-by: Felix Baumann <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/17752
Signed-off-by: Robert Marko <[email protected]>

package/boot/kexec-tools/Makefile

@@ -24,7 +24,7 @@ include $(INCLUDE_DIR)/package.mk
 define Package/kexec-tools/Default
   SECTION:=utils
   CATEGORY:=Utilities
-  URL:=http://kernel.org/pub/linux/kernel/people/horms/kexec-tools/
+  URL:=https://github.com/horms/kexec-tools
 endef
 
 define Package/kexec-tools