tests: disable progress estimate in test-debugbuilddag.t
If the command takes long enough, including 'estimate' in the format
will add some more data to the progress bar output, and make the test
fail. See e.g.
https://buildd.debian.org/status/fetch.php?pkg=mercurial&arch=kfreebsd-amd64&ver=2.1.2-2&stamp=1333493711
Mercurial
=========
Mercurial is a fast, easy to use, distributed revision control tool
for software developers.
Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
See http://mercurial.selenic.com/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.