subprojects: Make gnome-pwa-list a submodule
This way gnome-software can be built from a tarball or from git without network access at build time, as discussed here: gnome-build-meta!1616 (comment 1470108)
This way gnome-software can be built from a tarball or from git without network access at build time, as discussed here: gnome-build-meta!1616 (comment 1470108)