Patch C simdjson library to use emalloc_safe/efree for depth/byte buffers

[TysonAndre]

• This would allow performance monitoring tools to properly indicate how much memory simdjson uses during a request
• This would respect memory_limit settings in a conventional way and properly cause a php fatal error for invalid requests, e.g. an application receiving too much json

https://github.com/simdjson/simdjson/issues/1017 does not allow customizing the allocator yet