fb4cc98472
It will probably be just stubs for the significant future, but, here it is anyway. Regarding the naming: Yes, the official name is "aarch64." However, Linux, FreeBSD, and Zircon all call it "arm64", and so we will do the same. I've configured it initially to be a Clang-only port, making no changes to GCC buildtools whatsoever here. We'll see if that sticks, however.