[LSC] Add LOCAL_LICENSE_KINDS to system/tools/mkbootimg

Added SPDX-license-identifier-Apache-2.0 to:
  gki/Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all
Change-Id: I957d3faf553c8199d3468e0d1d07003c6d35c516
diff --git a/gki/Android.bp b/gki/Android.bp
index 50e995f..1c66c51 100644
--- a/gki/Android.bp
+++ b/gki/Android.bp
@@ -12,6 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
 python_binary_host {
     name: "generate_gki_certificate",
     defaults: ["mkbootimg_defaults"],