copas: add license info

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/copas/copas.mk

@@ -7,6 +7,7 @@
 COPAS_VERSION = 1.1.6
 COPAS_SITE = http://github.com/downloads/keplerproject/copas
 COPAS_DEPENDENCIES = lua coxpcall luasocket
+COPAS_LICENSE = MIT
 
 define COPAS_INSTALL_TARGET_CMDS
 	$(INSTALL) -m 0644 -D $(@D)/src/copas/copas.lua \