fix typos in mpd generation
fix typos in mpd generation

rbouqueau/gpac_brew_travis,aymanelyaagoubi/gpac,rbouqueau/gpac,rauf/gpac,aymanelyaagoubi/gpac,rbouqueau/gpac_brew_travis,porcelijn/gpac,gpac/gpac,porcelijn/gpac,gpac/gpac,rbouqueau/gpac,aymanelyaagoubi/gpac,ARSekkat/gpac,nguyen-viet-thanh-trung/gpac,nguyen-viet-thanh-trung/gpac,RodolpheFouquet/gpac,emmanouil/gpac,aymanelyaagoubi/gpac,porcelijn/gpac,rauf/gpac,rbouqueau/gpac_brew_travis,RodolpheFouquet/gpac,emmanouil/gpac,emmanouil/gpac,ARSekkat/gpac,gpac/gpac,nguyen-viet-thanh-trung/gpac,ARSekkat/gpac,gpac/gpac,rauf/gpac,gpac/gpac,porcelijn/gpac,RodolpheFouquet/gpac,RodolpheFouquet/gpac,ARSekkat/gpac,porcelijn/gpac,rbouqueau/gpac_brew_travis,aymanelyaagoubi/gpac,nguyen-viet-thanh-trung/gpac,emmanouil/gpac,ARSekkat/gpac,rauf/gpac,emmanouil/gpac,RodolpheFouquet/gpac,rbouqueau/gpac,nguyen-viet-thanh-trung/gpac,ARSekkat/gpac,porcelijn/gpac,rbouqueau/gpac_brew_travis,rbouqueau/gpac,rbouqueau/gpac,rbouqueau/gpac,rbouqueau/gpac,rauf/gpac,rbouqueau/gpac,aymanelyaagoubi/gpac,gpac/gpac,gpac/gpac,gpac/gpac,emmanouil/gpac,rauf/gpac,rbouqueau/gpac_brew_travis,RodolpheFouquet/gpac,nguyen-viet-thanh-trung/gpac