add stretch support for emacs-nox

manifests/os/debian.pp

@@ -126,8 +126,9 @@ class base::os::debian (
   # Handle additional distribution-specific tweaks, usually related to the
   # default package set.
   case $::lsbdistcodename {
-    'wheezy': { package { 'emacs23-nox': ensure => present } }
-    'jessie': { package { 'emacs24-nox': ensure => present } }
+    'wheezy':  { package { 'emacs23-nox': ensure => present } }
+    'jessie':  { package { 'emacs24-nox': ensure => present } }
+    'stretch': { package { 'emacs-nox':   ensure => present } }
   }
 
   # Ensure this file exists, containing only a comment.