ch Janet value take less memory and allow the VM to be faster
(although Janet mainly uses the technique for the first reason). This technique, however, is not valid C of any kind, and will
only work correctly on some architectures. Many 64 bit architectures will have trouble with the nanboxing code, so it is by
default turned off on 64 bit, non x86 architectures. However, one may also want to turn off nanboxing for other reasons, so
this flag is exposed for that reason. If an unsupported architecture mistak