[gupnp-av] build: Allow use as subproject

[Jens Georg <jensgeorg src gnome org>]

commit 1a6e28a69d5fc75ef624681b529b9b47c38d562e
Author: Jens Georg <mail jensge org>
Date:   Sat Jun 19 17:45:27 2021 +0200

    build: Allow use as subproject

 libgupnp-av/meson.build | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/libgupnp-av/meson.build b/libgupnp-av/meson.build
index eee66a4..89a5b38 100644
--- a/libgupnp-av/meson.build
+++ b/libgupnp-av/meson.build
@@ -39,6 +39,8 @@ gupnp_av_lib = library('gupnp-av-1.0',
 )
 gupnp_av = declare_dependency(link_with : gupnp_av_lib, include_directories : include_directories('..'))
 
+meson.override_dependency('gunp-av-1.0', gupnp_av)
+
 public_headers = [
         'gupnp-av-enums.h',
         'gupnp-av-error.h',