i#1569 AArch64: Add AArch64 cross-compilation to test suite.
i#1569 AArch64: Add AArch64 cross-compilation to test suite.

Review-URL: https://codereview.appspot.com/291060043

AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio