Adjust gen_make.py to handle wrapped add-deps.

* build.conf: Revert temporary fix from r1514020.

* build/generator/gen_make.py
  (Generator.write): Make the add_deps value in the _eztdata be a list.

* build/generator/templates/build-outputs.mk.ezt: Treat target.add_deps as a list.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1514030 13f79535-47bb-0310-9956-ffa450edef68