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

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