Other architectures

The portability of the kernel and toolchains is amazing: change an option and most things magically work on completely different hardware.

arm

First build:

./run -a arm

Run without build:

./runqemu -a arm

Debug:

./runqemu -a arm -d
# On another terminal.
./rungdb -a arm

TODOs:

only managed to run in the terminal interface (but weirdly a blank QEMU window is still opened)
GDB not connecting to KGDB. Possibly linked to -serial stdio. See also: https://stackoverflow.com/questions/14155577/how-to-use-kgdb-on-arm

./run -a aarch64

TODOs:

GDB gives a ton of messages:
```
no module object found for ''
```
when you connect. Ctrl + C then c works though.
How to add devices to -M virt as we did for -M versatilepb

./run -a mips64