[InstCombine] Precommit updated and-xor-or.ll tests. NFC.

Tests for:
```
(c | ~(a & b)) & (b | ~(a & c)) --> ~(a & (b ^ c))
(b | ~(a & c)) & ~(a & b) --> ~((b | c) & a)
(b & ~(a | c)) | ~(a | b) --> ~((b & c) | a) (2 uses test)
```