tests/test-gendoc-pt_BR.t

test: use a different timestamp for the updated file

In the test we want to trigger a write after the underlying dirstate changed. To
do so, we need a write. And as we are about to make dirstate update smarter we
need to meddle with the script a bit to make sure there will be a write.

Differential Revision: https://phab.mercurial-scm.org/D11793

#require docutils gettext

  $ $TESTDIR/check-gendoc pt_BR
  checking for parse errors