by making the build file generator script (mostly) architecture independent.
Bug: 269761242
Test: build x64 and arm64 locally
Change-Id: I76ea4bc0ba5e8e5c152b93cb1ad7a385c796adae
For x86, x86_64, arm and arm64
Bug: 261600888
Test: build and run cuttlefish x86, x86_64 and arm64
Change-Id: I3ac4dad1ac9ec83b0e626e64715df450e8809b82