scons: add license info

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/scons/scons.mk

@@ -1,6 +1,8 @@
 SCONS_VERSION = 2.0.1
 SCONS_SOURCE = scons-$(SCONS_VERSION).tar.gz
 SCONS_SITE = http://downloads.sourceforge.net/project/scons/scons/$(SCONS_VERSION)
+SCONS_LICENSE = MIT
+SCONS_LICENSE_FILES = LICENSE.txt
 
 define HOST_SCONS_BUILD_CMDS
 	(cd $(@D); python setup.py build)