is required by gettext which is in turn required by optparse (used in
setup.py to parse CPPFLAGS and LDFLAGS), thus catch gettext import
error in Lib/optparse.py, likewise Python 2.6.



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@44016 20353a03-c40f-0410-a6d1-a30d3c3de9de