MATCH: Add pattern for `(x | y) & (x & z)`

MATCH: Add pattern for `(x | y) & (x & z)`

Like the pattern already there for `(x | y) & x`,
this adds a simple pattern to optimize `(x | y) & (x & z)`
to just `x & z`.

OK? Bootstrapped and tested on x86-64-linux-gnu with no regressions.

gcc/ChangeLog:

	PR tree-optimization/103536
	* match.pd (`(x | y) & (x & z)`,
	`(x & y) | (x | z)`): New patterns.

gcc/testsuite/ChangeLog:

	PR tree-optimization/103536
	* gcc.dg/tree-ssa/andor-6.c: New test.
	* gcc.dg/tree-ssa/andor-bool-1.c: New test.