girparser: Fix parsing glib:boxed
girparser: Fix parsing glib:boxed

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