Since #20233 compiling with clang 10.0 fails:
```
bench/addrman.cpp:113:32: error: non-constant-expression cannot be narrowed from type 'unsigned long long' to 'size_t' (aka 'unsigned int') in initializer list [-Wc++11-narrowing]
    const size_t addrman_count{bench.epochs() * bench.epochIterations()};
                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bench/addrman.cpp:113:32: note: insert an explicit cast to silence this issue
    const size_t addrman_count{bench.epochs() * bench.epochIterations()};
                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                               static_cast<size_t>(                    )
1 error generated.
make[2]: *** [Makefile:12508: bench/bench_bitcoin-addrman.o] Error 1
```
{
    for (size_t source_i = 0; source_i < NUM_SOURCES; ++source_i) {
        addrman.Add(g_addresses[source_i], g_sources[source_i]);
    }
}
static void FillAddrMan(CAddrMan& addrman)
{
    CreateAddresses();
    AddAddressesToAddrMan(addrman);
}
static void AddrManAdd(benchmark::Bench& bench)