debian/control: add libconfig-tiny-perl dependency

rtpengine-ctl uses Config::Tiny for reading the config file.
This commit adds the dependency to the utils package.

Change-Id: Iae0892fe9c8d30435eecc513cf538122b2fbe2c7

debian/control

@@ -149,6 +149,7 @@ Depends:
  libio-socket-inet6-perl,
  libio-socket-ip-perl,
  libsocket6-perl,
+ libconfig-tiny-perl,
  netcat-openbsd | netcat,
  ${misc:Depends},
  ${perl:Depends},