This has the side effect of building tests for both 32 and 64 bit, where required. Change-Id: I674800d34b4fa7cc5d34573c96b754ac85777970
Rename aarch64 build targets to arm64. The gcc toolchain is still aarch64. Change-Id: Ia92d8a50824e5329cf00fd6f4f92eae112b7f3a3