[lld] r319518 - Add an additional test for r319503.

[Rafael Espíndola via llvm-commits]

> If you compute the probability of false positive [1], the 128 KiB bloom
> filter that the GNU linker produced has 8.3% false positive rate [2] while
> our 128 KiB filter has 2.4% [3]. To me, 8.3% seems too high, so I'd keep our
> code as-is, but ideally we should do some benchmark.

This time I just timed the llvm tests when built with shared libraries

gold:                                  138.207661064 seconds time elapsed
lld master:                         143.343427881 seconds time elapsed
cutting bloom filter in half: 148.267076771 seconds time elapsed
bloom filter of size 1:         180.053104591 seconds time elapsed

So I a