The music industry is turning up the legal heat on Chinese websites it reckons are flouting its IP. First, Universal, Sony (NYSE: SNE) BMG and Warner have filed suit against Baidu, China’s biggest web portal, demanding it remove links to music files around the web. Second, Hong Kong-based EMI spin-off Gold Label Entertainment joins the trio for similar action against Sohu and its Sogou multimedia search site. And third, labels say Yahoo (NSDQ: YHOO) China “has still not complied” with the Beijing Higher People