NEIL YOUNG HAS A NEAR-RELI- gious faith in the power of spontaneity, from the first-draft, one-take brilliance of his best songs to the jagged path of his career as a whole. His urgent, political, occasionally jarring (there are some heavily Auto-Tuned vocals and computer voices) new album, Peace Trail, pushes that ethos to the max. “I would just get up in the morning,” says Young, who spent about a week recording the album with veteran drummer Jim Keltner and session bassist Paul Bushnell, “and pick up my guitar, and whatever I did, that was it. I built a song right on that and just wrote about what was on my mind. I’ve done a lot of records, made a lot of songs, played a lot of guitars, so I just…