Add BT product namespaces to gsi_arm64.mk.

Add these namespaces is required to build gsi_arm64 in Keystone.

Test: python3 vendor/google_keystone/build_local.py --build_target
gsi_arm64
Bug: 181059475

Change-Id: I76b884eaa6049c53e83d2a27506d2e5b2e079c45
1 file changed