Global --tag=CC defined in configure.ac is not correct in all cases. For example
linking objects that were compiled from C++ sources needs to be done with C++
compiler, however for link mode libtool will prefer compiler indicated with
--tag.
Fixes GH-12349
This is an end-to-end fuzzer that executes arbitrary PHP code.
We replace the executor with a finite-step executor to avoid
getting stuck in loops or recursion.
Unlike the straight unserialize fuzzer, this runs only on HashContexts,
and it does an update and finalize on the contexts it creates.
Co-authored-by: Nikita Popov <nikic@php.net>