quagga: add license information

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/quagga/quagga.mk

@@ -7,6 +7,8 @@
 QUAGGA_VERSION = 0.99.21
 QUAGGA_SITE = http://download.savannah.gnu.org/releases/quagga
 QUAGGA_DEPENDENCIES = host-gawk
+QUAGGA_LICENSE = GPLv2+
+QUAGGA_LICENSE_FILES = COPYING
 QUAGGA_CONF_OPT = --program-transform-name='' --enable-netlink
 
 QUAGGA_CONF_OPT += $(if $(BR2_PACKAGE_QUAGGA_ZEBRA),--enable-zebra,--disable-zebra)