message: drake: do not install libboost_system for the examples, just use it
  That drake.copy was responsible for the creation of an
  `elle/lib/libboost_system-1_60.dylib` file in our filesystem install
  tree.
diff: @@ -1095,6 +1095,7 @@ using python : %(python_version)s : %(python_prefix)s/%(python_bin)s : %(python_
  ]
  def execute(self):
  + # FIXME: Code duplication with PatchAndInstall.
  with drake.CWDPrinter(
  drake.path_build('.', absolute = True) / self.__cwd):
  if not self.cmd('Build Boost',
  @@ -1536,8 +1537,7 @@ using python : %(python_version)s : %(python_prefix)s/%(python_bin)s : %(python_
  if cxx_toolkit.os in [drake.os.windows, drake.os.ios, drake.os.android]:
  example_config += boost.config_system(static = True)
  else:
  - example_config.library_add(
  - drake.copy(boost.system_dynamic, 'lib', strip_prefix = True))
  + example_config.library_add(boost.system_dynamic)
  examples = [
  'samples/http_get_signed_json',
  'samples/get_wikipedia',
  