Please add autopkgtest support

I committed the autopkgtest support in [1].

[1] http://anonscm.debian.org/gitweb/?p=devscripts/devscripts.git;a=commitdiff;h=721b08a6

I ran this in a VM, and get this failure:

adt-run: trace: & dsc0t-shunit2: - - - - - - - - - - results - - - - - - - - - -
dsc0t-shunit2 FAIL status: 2, stderr: test/test_checkbashisms: 190: .: sh...
adt-run: trace: & dsc0t-shunit2: - - - - - - - - - - stderr - - - - - - - - - -
test/test_checkbashisms: 190: .: shunit2: not found

Looks like a missing test dependency?

Yes, I forgot to add shunit2 to the test dependency which I have done now in [1].

[1] http://anonscm.debian.org/gitweb/?p=devscripts/devscripts.git;a=commitdiff;h=420268f1

This bug was fixed in the package devscripts - 2.13.0ubuntu1

---------------
devscripts (2.13.0ubuntu1) raring; urgency=low

  * Merge from Debian experimental. Remaining changes:
    - Convert python scripts to python3. (Closes: #680313)
      Debian bug #695259 needs to be fixed to get the change into Debian.

devscripts (2.13.0) experimental; urgency=low

  [ Christoph Berg ]
  * origtargz: New script: fetch the orig tarball of a Debian package from
    various sources, and unpack it
  * debcommit: --changelog-info will pass --author and --date for git commits.

  [ James McCoy ]
  * licensecheck: Recognize MPL 2.0 licenses. Thanks to Ryan Pavlik for the
    patch. (Closes: #687664)
  * namecheck: Check Apache's projects page for names. (Closes: #686862)
  * debcommit:
    + Drop checks for old dpkg versions and always use the necessary Perl
      modules (Dpkg::Changelog::Parse, Dpkg::Vendor::Ubuntu,
      Dpkg::Changelog::Entry::Debian).
    + Add changelog info support for hg and bzr.
  * annotate-output:
    + Handle an incomplete line of output. (Closes: #695609)
    + Don't treat backslashes in the command's output as an escape. (Closes:
      #695613)
    + Don't swallow leading whitespace. (Closes: #695612, LP: #1120917)
  * dscverify: Use "gpg --status-fd" to determine if a valid signature is
    found and only use the signed content. (Closes: #695914)
  * wrap-and-sort: Fix repeated word in man page. (Closes: #696363)

  [ Dmitry Smirnov ]
  * licensecheck:
    + Remove any regular comments pattern. (Closes: #526698)
    + Improve command line parsing.
    + Fix GPL license version detection bug.
    + Fix BSD-3-clause detection.

  [ Paul Wise ]
  * checkbashisms: When examining a bash script, indicate the lack of use of
    bashisms.
  * uscan:
    + Access GitHub directly instead of using githubredir.debian.net in
      example GitHub watch URL.
    + Add an example watch URL that matches the various file extensions used
      by common archive formats.
    + Add an example watch URL for Google Code projects.

  [ Benjamin Drung ]
  * Add bashism test cases from Raphael Geissert.
  * Add autopkgtest support. (LP: #1073330)
  * suspicious-source: Add inode/symlink and image/x-xpmi to whitelisted
    mime-types.
  * wrap-and-sort:
    + Put special entries (variables and placeholders) at the end of the list.
    + Sort debian/control*.in files too.
  * licensecheck: detect (L)GPL licenses more permissively. Thanks to
    Laurent Rineau for the patch. (Closes: #659231)
  * Bump Standards-Version to 3.9.4 (no changes needed).

  [ Cyril Brulebois ]
  * Don't auto reverse diffs when DEBDIFF_AUTO_VER_SORT is set to yes, and
    when the version in both packages is the same. (Closes: #650732)

  [ Tony Mancill ]
  * debsnap: Escape the package name when used in regex. (Closes: #696018)

  [ David Prévot ]
  * Minor manpages convention fix: do not terminate the SEE ALSO lists with a
    period. (Closes: #696416)
  * French translation update.

  [ Josselin Mouette ]
  * nmudiff: Use dpkg-parsechangelog to fix manual parsing bug (Closes: #700584)

  [ Raphael Geissert ]
  * checkbashisms:
    + allow -FOO- as heredoc delimite...