fold-const: Fix up ((1 << x) & y) != 0 folding for vectors [PR99225]

fold-const: Fix up ((1 << x) & y) != 0 folding for vectors [PR99225]

This optimization was written purely with scalar integers in mind,
can work fine even with vectors, but we can't use build_int_cst but
need to use build_one_cst instead.

2021-02-24  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/99225
	* fold-const.c (fold_binary_loc) <case NE_EXPR>: In (x & (1 << y)) != 0
	to ((x >> y) & 1) != 0 simplifications use build_one_cst instead of
	build_int_cst (..., 1).  Formatting fixes.

	* gcc.c-torture/compile/pr99225.c: New test.

(cherry picked from commit 4de402ab60c54fff48cb7371644b024d10d7e5bb)