MT#9617 Build-Depend on libgnutls28-dev or libgnutls-dev

Debian/jessie doesn't provide libgnutls-dev (yet).

debian/control

@@ -2,7 +2,7 @@ Source: heartbeat-2
 Section: admin
 Priority: optional
 Maintainer: Sipwise Development Team <support@sipwise.com>
-Build-Depends: debhelper (>= 5.0.37.2), libsnmp-dev, libglib2.0-dev, perl, net-tools, iputils-ping, python (>=2.6.6-3~), psmisc, libnet1-dev, iproute, libtool, libcurl4-openssl-dev | libcurl3-openssl-dev, libxml2-dev, bison, flex, uuid-dev, lynx, libbz2-dev, zlib1g-dev, uuid-dev, libsensors4-dev, libltdl3-dev, swig, openssh-client, libgnutls-dev, dh-python, python-dev, libpam0g-dev, libncurses5-dev, psmisc, libopenhpi-dev, quilt
+Build-Depends: debhelper (>= 5.0.37.2), libsnmp-dev, libglib2.0-dev, perl, net-tools, iputils-ping, python (>=2.6.6-3~), psmisc, libnet1-dev, iproute, libtool, libcurl4-openssl-dev | libcurl3-openssl-dev, libxml2-dev, bison, flex, uuid-dev, lynx, libbz2-dev, zlib1g-dev, uuid-dev, libsensors4-dev, libltdl3-dev, swig, openssh-client, libgnutls28-dev | libgnutls-dev, dh-python, python-dev, libpam0g-dev, libncurses5-dev, psmisc, libopenhpi-dev, quilt
 Standards-Version: 3.9.5
 
 Package: ldirectord-2