mx-1.0: add missing metadata
mx-1.0: add missing metadata

frida/vala,kamanashisroy/aroop,GNOME/vala,spidermonkdust/vala,severinh/vala,severinh/vala,frida/vala,Distrotech/vala,jessevdk/vala,Distrotech/vala,frida/vala,jessevdk/vala,frida/vala,tjol/vala-tjol,rvu95/vala,rvu95/vala,Distrotech/vala,GNOME/vala,GNOME/vala,spidermonkdust/vala,tjol/vala-tjol,GNOME/vala,kamanashisroy/aroop,xdave/pvala,severinh/vala,playya/vala,rvu95/vala,tjol/vala-tjol,flobrosch/vala-fixes,kamanashisroy/aroop,flobrosch/vala-fixes,playya/vala,spidermonkdust/vala,frida/vala,playya/vala,flobrosch/vala-fixes,jessevdk/vala