eb0e12c0c2
Reorganize and update the aarch64 cross guide with clang cross compilation. Update the GNU toolchain version which clang also uses. Reorganize into common part, GNU part and clang part. Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech> Acked-by: Ruifeng Wang <ruifeng.wang@arm.com>