UMG's storied Mexican-music label Fonovisa-Disa, home to legacy releases by Alejandro Fernandez, Los Bukis and Los Tigres del Norte, has been rebranded as Fono, complete with a snazzy new logo and tagline: "Música, No Borders."The relaunch comes as música Mexicana continues to grow rapidly in Mexico and the U.S.Fonovisa-Disa's 40-plus-year history has seen, among other…