[llvm] llvm-reduce: Don't print verifier failed machine functions (PR #109673)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> > I noticed that if I run llc now, some input that previously failed in the
> > ```
> > MBB->getParent()->verify();
> > ```
> 
> This needs to pass in the output stream to the verify call, the default is now no output
> 

Done in b7b945b09cddad128e42d82d759e74f0cd5b0ee3

https://github.com/llvm/llvm-project/pull/109673