Update translations

Update translations

* gettext-runtime/po/fr.po: Update from Stéphane Aulery <lkppo@free.fr>.
* gettext-runtime/po/nb.po: Update from Johnny A. Solbu <johnny@solbu.net>.
* gettext-runtime/po/pt_BR.po: Update from Rafael Ferreira <rffontenelle@gmail.com>.
* gettext-runtime/po/sr.po: Update from Мирослав Николић <miroslavnikolic@rocketmail.com>.
* gettext-runtime/po/zh_TW.po: Update from Wei-Lun Chao <bluebat@member.fsf.org>.
* gettext-tools/examples/po/fr.po: Update from Stéphane Aulery <lkppo@free.fr>.
* gettext-tools/examples/po/nb.po: Update from Johnny A. Solbu <johnny@solbu.net>.
* gettext-tools/examples/po/pt_BR.po: Update from Rafael Ferreira <rffontenelle@gmail.com>.
* gettext-tools/examples/po/sr.po: Update from Мирослав Николић <miroslavnikolic@rocketmail.com>.
* gettext-tools/examples/po/zh_TW.po: Update from Wei-Lun Chao <bluebat@member.fsf.org>.
* gettext-tools/po/bg.po: Update from Roumen Petrov <transl@roumenpetrov.info>.
* gettext-tools/po/es.po: Update from Antonio Ceballos <aceballos@gmail.com>.
* gettext-tools/po/fr.po: Update from Stéphane Aulery <lkppo@free.fr>.
* gettext-tools/po/ja.po: Update from Masahito Yamaga <ma@yama-ga.com>.
* gettext-tools/po/nl.po: Update from Benno Schulenberg <benno@vertaalt.nl>.
* gettext-tools/po/pt_BR.po: Update from Rafael Fontenelle <rffontenelle@gmail.com>.
* gettext-tools/po/sk.po: Update from Marcel Telka <marcel@telka.sk>.
* gettext-tools/po/sl.po: Update from Primoz PETERLIN <primozz.peterlin@gmail.com>.
* gettext-tools/po/sr.po: Update from Мирослав Николић <miroslavnikolic@rocketmail.com>.
* gettext-tools/po/uk.po: Update from Yuri Chornoivan <yurchor@ukr.net>.
* gettext-tools/po/vi.po: Update from Trần Ngọc Quân <vnwildman@gmail.com>.