package/kvm-unit-tests: fix license information

Some files in kvm-unit-tests are licensed under the GPL v2 nowadays:

 https://gitlab.com/kvm-unit-tests/kvm-unit-tests/-/commit/b29b222beb424a00

Signed-off-by: Thomas Huth <huth@tuxfamily.org>
[yann.morin.1998@free.fr: do not replace LGPLGv2, add to the list]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 8c05e5a069cf037a9ff314effd6415a433ac40cc)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/kvm-unit-tests/kvm-unit-tests.mk

@@ -7,7 +7,7 @@
 KVM_UNIT_TESTS_VERSION = kvm-unit-tests-20171020
 KVM_UNIT_TESTS_SITE = https://git.kernel.org/pub/scm/virt/kvm/kvm-unit-tests.git
 KVM_UNIT_TESTS_SITE_METHOD = git
-KVM_UNIT_TESTS_LICENSE = LGPL-2.0
+KVM_UNIT_TESTS_LICENSE = GPL-2.0, LGPL-2.0
 KVM_UNIT_TESTS_LICENSE_FILES = COPYRIGHT
 
 ifeq ($(BR2_arm),y)