Speed boost for NUMA aware systems

[chhu]

Just FYI, after building on my aged 1st gen Threadripper system (debian) I got 26 t/s output, but when I added --numa distribute to the llama-cli call it jumped up to 40! Kind of makes sense but some may have NUMA systems and don't know / care about its potential. Be aware that if you try that you need to evict the cache first. With sudo bash: echo 3 > /proc/sys/vm/drop_caches

Not sure why there are no better defaults for numa awareness or how / if this works on windows.