releasetools: Android T GKI certification scheme

Companion change of Iaf48a6e3d4b97fa6bfb5e1635a288b045baa248f
To support new GKI certification scheme for boot.img and
init_boot.img on upgrading and launching device combinations.

Bug: 210367929
Bug: 211741246
Bug: 203698939
Test: atest --host releasetools_test:test_common
Test: unpack_bootimg --boot_img boot.img
Test: unpack_bootimg --boot_img init_boot.img
Test: avbtool info_image --image out/boot_signature
Change-Id: I3749297c09c3899046550e4be776acbeea37ef2e
diff --git a/tools/releasetools/Android.bp b/tools/releasetools/Android.bp
index f3123b2..7b2c290 100644
--- a/tools/releasetools/Android.bp
+++ b/tools/releasetools/Android.bp
@@ -162,6 +162,7 @@
     required: [
         "brillo_update_payload",
         "checkvintf",
+        "generate_gki_certificate",
         "minigzip",
         "lz4",
         "toybox",
@@ -236,6 +237,7 @@
         "boot_signer",
         "brotli",
         "bsdiff",
+        "generate_gki_certificate",
         "imgdiff",
         "minigzip",
         "lz4",
@@ -301,6 +303,7 @@
         "brotli",
         "bsdiff",
         "deapexer",
+        "generate_gki_certificate",
         "imgdiff",
         "minigzip",
         "lz4",