Update Portuguese dpkg translation

[guillem@debian.org:
 - Fix some typos.
 - Change “fazer close” to “fechar”.
 - Use “época” instead of “era”.
 - Use spaces instead of ‘\t’.
 - Add missing newlines at EOL.
 - Break long lines with newlines.
 - Remove excess final dots.
 - Fix capitalization of some words.
 - Add missing translation for --debug=help output.
 - Do not translate Multi-Arch field values.
 - Do not translate dpkg-deb -Z and -S values.
 - Use 8.3 instead of 8.333 for dpkg-deb --msdos help. ]

Closes: #682582

debian/changelog

@@ -2,6 +2,7 @@ dpkg (1.16.9) UNRELEASED; urgency=low
 
   [ Updated programs translations ]
   * Czech (Miroslav Kure).
+  * Portuguese (Miguel Figueiredo). Closes: #682582
 
   [ Updated dselect translations ]
   * Czech (Miroslav Kure).