fix: install non-dfsg package for emacs

for sake of tramp info manual

cf. https://www.reddit.com/r/emacs/comments/d6r3dt/comment/f0vujx6/

rattail_fabric2/apt.py

@@ -112,4 +112,7 @@ def install_emacs(c):
         if ubuntu_version and ubuntu_version < 16:
             emacs = 'emacs23-nox'
 
-    install(c, emacs, 'emacs-goodies-el')
+    install(c, emacs,
+            'emacs-common-non-dfsg', # nb. includes tramp manual
+            'emacs-goodies-el',
+            )