debian: add missing netbase dependency

Apparently, some machines don't have this service (launchpad builders are one
such example). This adds the correct dependency for test-serve.t.

contrib/debian/control

@@ -1,51 +1,52
 Source: mercurial
 Section: vcs
 Priority: optional
 Maintainer: Mercurial Developers <[e-mail]>
 Build-Depends:
  debhelper (>= 7),
  dh-python,
+ netbase,
  python-all,
  python-all-dev,
  python-docutils,
  zip,
  unzip
 Standards-Version: 3.9.4
 X-Python-Version: >= 2.6
 
 Package: mercurial
 Depends:
  python,
  ${shlibs:Depends},
  ${misc:Depends},
  ${python:Depends},
  mercurial-common (= ${source:Version})
 Architecture: any
 Description: fast, easy to use, distributed revision control tool.
  Mercurial is a fast, lightweight Source Control Management system designed
  for efficient handling of very large distributed projects.
  .
  Its features include:
   * O(1) delta-compressed file storage and retrieval scheme
   * Complete cross-indexing of files and changesets for efficient exploration
     of project history
   * Robust SHA1-based integrity checking and append-only storage model
   * Decentralized development model with arbitrary merging between trees
   * Easy-to-use command-line interface
   * Integrated stand-alone web interface
   * Small Python codebase
 
 Package: mercurial-common
 Architecture: all
 Depends:
  ${misc:Depends},
  ${python:Depends},
 Recommends: mercurial (= ${source:Version}), ca-certificates
 Breaks: mercurial (<< ${source:Version})
 Replaces: mercurial (<< 2.6.3)
 Description: easy-to-use, scalable distributed version control system (common files)
  Mercurial is a fast, lightweight Source Control Management system designed
  for efficient handling of very large distributed projects.
  .
  This package contains the architecture independent components of Mercurial,
  and is generally useless without the mercurial package.