Você precisa instalar o pacote inttool.
Para isso:
sudo apt get install intltool
De link
Package: intltool
Utility scripts for internationalizing XML
Automatically extracts translatable strings from oaf, glade, bonobo ui, nautilus theme and other XML files into the po files.
Automatically merges translations from po files back into .oaf files (encoding to be 7-bit clean). The merging mechanism can also be extended to support other types of XML files.
PS. tirou a recomendação do automake. Isso vem como uma dependência.