Update jasp-building-guide.md
Update jasp-building-guide.md

missed some Qt 5.12 and 5.13 references
jasp-stats/jasp-desktop,TimKDJ/jasp-desktop,TimKDJ/jasp-desktop,AlexanderLyNL/jasp-desktop,AlexanderLyNL/jasp-desktop,AlexanderLyNL/jasp-desktop,AlexanderLyNL/jasp-desktop,TimKDJ/jasp-desktop,AlexanderLyNL/jasp-desktop,jasp-stats/jasp-desktop,FransMeerhoff/jasp-desktop,FransMeerhoff/jasp-desktop,TimKDJ/jasp-desktop,boutinb/jasp-desktop,FransMeerhoff/jasp-desktop,jasp-stats/jasp-desktop,jasp-stats/jasp-desktop,FransMeerhoff/jasp-desktop,boutinb/jasp-desktop,TimKDJ/jasp-desktop,boutinb/jasp-desktop,AlexanderLyNL/jasp-desktop,FransMeerhoff/jasp-desktop,boutinb/jasp-desktop,boutinb/jasp-desktop,jasp-stats/jasp-desktop,jasp-stats/jasp-desktop,TimKDJ/jasp-desktop,FransMeerhoff/jasp-desktop,TimKDJ/jasp-desktop,TimKDJ/jasp-desktop,jasp-stats/jasp-desktop,AlexanderLyNL/jasp-desktop,boutinb/jasp-desktop,FransMeerhoff/jasp-desktop,FransMeerhoff/jasp-desktop,boutinb/jasp-desktop,AlexanderLyNL/jasp-desktop,boutinb/jasp-desktop,jasp-stats/jasp-desktop