dpkg-shlibdeps(1): Make explicit that -e can be used multiple times

debian/changelog

@@ -1,6 +1,7 @@
 dpkg (1.17.1) UNRELEASED; urgency=low
 
-  *
+  * Man pages cleanup:
+    - Make explicit that dpkg-shlibdeps -e can be used multiple times.
 
  -- Guillem Jover <guillem@debian.org>  Sat, 27 Jul 2013 05:32:21 +0200
 

man/dpkg-shlibdeps.1

@@ -135,6 +135,7 @@ been supplied as
 .BI \-e executable
 Include dependencies appropriate for the shared libraries required by
 .IR executable .
+This option can be used multiple times.
 .TP
 .BI \-l directory
 Add