Since 42a7f46d it is required to re-run gettextize because
we run autoreconf.
Unfortunately gettextize doesn't run in non interactive mode (this
is an advertised "feature").

This gpg-error patch will appear in the next release so it doesn't
need maintenance:
http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgpg-error.git;a=commit;h=c35dbfdaa2e30e08185e4a468278a29e2c48b500