axel: add license informations

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/axel/axel.mk

@@ -6,6 +6,8 @@
 AXEL_VERSION = 2.4
 AXEL_SOURCE = axel-$(AXEL_VERSION).tar.gz
 AXEL_SITE = https://alioth.debian.org/frs/download.php/3015
+AXEL_LICENSE = GPLv2+
+AXEL_LICENSE_FILES = COPYING
 
 AXEL_LDFLAGS = -lpthread