[gnome-build-meta/valentindavid/pipewire-experiment] Fix build of NetworkManager

[Valentin David <valentindavid src gnome org>]

commit c16d6e64e0a8b1b2683a020cae798fe47fe898b6
Author: Valentin David <valentin david codethink co uk>
Date:   Tue Sep 8 17:21:00 2020 +0200

    Fix build of NetworkManager

 elements/core-deps/NetworkManager.bst | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/elements/core-deps/NetworkManager.bst b/elements/core-deps/NetworkManager.bst
index ff5a821a..d2b12736 100644
--- a/elements/core-deps/NetworkManager.bst
+++ b/elements/core-deps/NetworkManager.bst
@@ -3,6 +3,8 @@ sources:
 - kind: git_tag
   url: git_freedesktop_org:NetworkManager/NetworkManager.git
   track: master
+- kind: patch
+  path: https://gitlab.freedesktop.org/valentindavid/NetworkManager
 build-depends:
 - core-deps/intltool.bst
 - sdk/gtk-doc.bst