codegen: Add G_GNUC_FORMAT attribute for FormatArg function-pointers
codegen: Add G_GNUC_FORMAT attribute for FormatArg function-pointers

frida/vala,frida/vala,GNOME/vala,frida/vala,GNOME/vala,frida/vala,frida/vala,GNOME/vala,GNOME/vala