Fix clang driver tests for cspgo in lld

The tests introduced by https://reviews.llvm.org/D151589 were failing
because I guess some test platforms don't have `lld`. Similar tests add
`-B%S/Inputs/lld` to the clang commands so lets try this here to fix the
tests.

```
clang: error: invalid linker name in argument '-fuse-ld=lld'
```