GIR writer: Write virtual signal handlers
GIR writer: Write virtual signal handlers

frida/vala,tjol/vala-tjol,GNOME/vala,Distrotech/vala,spidermonkdust/vala,jessevdk/vala,tjol/vala-tjol,playya/vala,Distrotech/vala,spidermonkdust/vala,severinh/vala,severinh/vala,Jc2k/vala,spidermonkdust/vala,frida/vala,kamanashisroy/aroop,GNOME/vala,flobrosch/vala-fixes,themiwi/vala,themiwi/vala,rvu95/vala,themiwi/vala,playya/vala,rvu95/vala,severinh/vala,rvu95/vala,xdave/pvala,phako/vala,jessevdk/vala,GNOME/vala,GNOME/vala,playya/vala,frida/vala,flobrosch/vala-fixes,kamanashisroy/aroop,frida/vala,kamanashisroy/aroop,tjol/vala-tjol,Distrotech/vala,phako/vala,flobrosch/vala-fixes,jessevdk/vala,frida/vala,Jc2k/vala