po: Fix encoding issues

Remove trailing CR characters, and fix Content-Transfer-Encoding field
value.

po/nb.po

@@ -1,12 +1,12 @@
-# Norsk Bokmal translation of messages in APT.
-# The file is available under Gnu Public License version 2.
-# Get the license from http://www.gnu.org/licenses/gpl.txt
-# Copyright:
-# Lars Bahner <bahner@debian.org>, 2002-2003.
-# Axel Bojer <axelb@skolelinux.no>, 2003-2004.
-# Klaus Ade Johnstad <klaus@skolelinux.no>, 2004.
-# Bjorn Steensrud <bjornst@powertech.no>, 2004.
-# Hans Fredrik Nordhaug <hans@nordhaug.priv.no>, 2003, 2005-2010.
+# Norsk Bokmal translation of messages in APT.
+# The file is available under Gnu Public License version 2.
+# Get the license from http://www.gnu.org/licenses/gpl.txt
+# Copyright:
+# Lars Bahner <bahner@debian.org>, 2002-2003.
+# Axel Bojer <axelb@skolelinux.no>, 2003-2004.
+# Klaus Ade Johnstad <klaus@skolelinux.no>, 2004.
+# Bjorn Steensrud <bjornst@powertech.no>, 2004.
+# Hans Fredrik Nordhaug <hans@nordhaug.priv.no>, 2003, 2005-2010.
 msgid ""
 msgstr ""
 "Project-Id-Version: apt 1.0.5\n"