rt-test: add license information

[Peter; fix variable name typo]
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
diff --git a/package/rt-tests/rt-tests.mk b/package/rt-tests/rt-tests.mk
index e6455d5..bee4782 100644
--- a/package/rt-tests/rt-tests.mk
+++ b/package/rt-tests/rt-tests.mk
@@ -4,9 +4,11 @@
 #
 ################################################################################
 
-RT_TESTS_SITE    = http://snapshot.debian.org/archive/debian/20111202T222101Z/pool/main/r/rt-tests/
+RT_TESTS_SITE = http://snapshot.debian.org/archive/debian/20111202T222101Z/pool/main/r/rt-tests/
 RT_TESTS_VERSION = 0.83
-RT_TESTS_SOURCE  = rt-tests_$(RT_TESTS_VERSION).orig.tar.gz
+RT_TESTS_SOURCE = rt-tests_$(RT_TESTS_VERSION).orig.tar.gz
+RT_TESTS_LICENSE = GPLv2+
+RT_TESTS_LICENSE_FILES = COPYING
 
 ifeq ($(BR2_PACKAGE_PYTHON),y)
 RT_TESTS_DEPENDENCIES = python