Feature Request: armv8l support

### Prerequisites - [x] I am running the latest code. Mention the version if possible as well. - [x] I carefully followed the [README.md](https://github.com/jart/cosmopolitan/blob/master/README.md). - [x] I searched using keywords relevant to my issue to make sure that I am creating a new issue that is not already open (or closed). - [x] I reviewed the [Discussions](https://github.com/jart/cosmopolitan/discussions), and have a new and useful enhancement to share. ### Feature Description I tried to run vim from https://cosmo.zip/pub/cosmos/bin/vim on an Android device with 32-bit userspace and 64-bit kernel (this is a common setup for low-RAM devices). The output was: `/data/local/tmp/vim: this ape program lacks armv8l support` Then I created a dummy `uname` script in the `$PATH` that unconditionally printed `aarch64`. This helped and vim ran flawlessly. ### Motivation There will be one more officially supported platform ### Possible Implementation `armv8l` should be treated in the same way as `aarch64`