glib-2.0: Conditionally use boxed OptionContext since 2.44
glib-2.0: Conditionally use boxed OptionContext since 2.44

spidermonkdust/vala,spidermonkdust/vala,GNOME/vala,rvu95/vala,frida/vala,rvu95/vala,rvu95/vala,GNOME/vala,frida/vala,GNOME/vala,frida/vala,frida/vala,frida/vala,spidermonkdust/vala,GNOME/vala