[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
1 file changed