build: Don't use deprecated gnome-autogen.sh
build: Don't use deprecated gnome-autogen.sh

Replace our autogen.sh with the template from

https://wiki.gnome.org/Projects/GnomeCommon/Migration

to avoid a dependency on the deprecated gnome-autogen.sh

GNOME/gsound,GNOME/gsound,tcbrindle/gsound,tcbrindle/gsound