po: Update all *.po files

Running "make install" modified the *.po files because
they were no longer up to date.

Synchronize them with latest ui/gtk.c and modified build
rules which use paths relative to the project root.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Message-id: 1375731922-24259-1-git-send-email-sw@weilnetz.de
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>