[calls] d/control: Add cmocka dependency

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit 9cdf46617f3e8d59af1ed17f1414017c812f069b
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Tue Oct 26 10:20:09 2021 +0200

    d/control: Add cmocka dependency

 debian/control | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/debian/control b/debian/control
index 5560ad10..154494ab 100644
--- a/debian/control
+++ b/debian/control
@@ -11,6 +11,7 @@ Build-Depends:
  gstreamer1.0-plugins-good,
  gtk-doc-tools <!nodoc>,
  libcallaudio-dev (>= 0.0.5),
+ libcmocka-dev,
  libebook-contacts1.2-dev,
  libfeedback-dev,
  libfolks-dev,