Sam Thursfield authored Oct 06, 2019 and Marinus Schraal committed Nov 06, 2019

This change makes it easier to build and test gnome-music on systems
which have old versions of Grilo installed. Meson will now automatically
clone and build the latest Git versions of grilo and grilo-plugins if
the system-installed versions are too old.

Distributors can disable this behaviour by passing
`--wrap-mode=nodownload` at configure time.