LibJIT / Lightning interoperability issue

[Daniel Schwen]

Hello list,

I noticed that both the LibJIT as well as Lightning libraries export
the jit_memcpy, jit_memmove, jit_realloc, and jit_free functions,
causing crashes when linking to both.

It looks like the functions are only declared in jit_private.h and not
part of the public API, so I have tried renaming them and this fixes
the problem:
https://github.com/dschwen/lightning/commit/268bd6ced9b350a1fc8edd02ce0b2c5cb32e6ad8
Another option would be to control symbol export in the build system.

Cheers,
Daniel