[Bug jit/96066] Cannot use values from some builtins because they are of void type

[bouanto at zoho dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96066

--- Comment #2 from Antoni <bouanto at zoho dot com> ---
An attempt to use, let's say, __atomic_fetch_add_4, will result in a error
like:

libgccjit.so: error: unimplemented primitive type for builtin (type: BT_I4)