build: Set repository callsign in .arcconfig

This fixes `arc diff` to select the right repository when submitting
patches.

1 files changed, 2 insertions, 1 deletions

diff --git a/.arcconfig b/.arcconfig
index 1c3e80e..ba3d1ea 100644
--- a/.arcconfig
+++ b/.arcconfig
@@ -1,5 +1,6 @@
 {
 	"phabricator.uri" : "https:\/\/phabricator.freedesktop.org\/",
 	"history.immutable" : true,
-	"project.name" : "libnice"
+	"project.name" : "libnice",
+	"repository.callsign" : "LIBNICE"
 }