BLD Add DISTDIR variable. ### Description

Adds `DISTDIR` env variable that points to the directory where libraries should be copied to when building shared libraries with recipe.

### Checklists

- [x] Add new / update outdated documentation

package:
  name: colorspacious
  version: 1.1.2
  top-level:
    - colorspacious
source:
  url: https://files.pythonhosted.org/packages/ab/a1/318b9aeca7b9856410ededa4f52d6f82174d1a41e64bdd70d951e532675a/colorspacious-1.1.2-py2.py3-none-any.whl
  sha256: c78befa603cea5dccb332464e7dd29e96469eebf6cd5133029153d1e69e3fd6f
requirements:
  run:
    - numpy
about:
  home: https://github.com/njsmith/colorspacious
  PyPI: https://pypi.org/project/colorspacious
  summary:
    A powerful, accurate, and easy-to-use Python library for doing colorspace
    conversions
  license: MIT

package:
  name: colorspacious
  version: 1.1.2
  top-level:
    - colorspacious
source:
  url: https://files.pythonhosted.org/packages/ab/a1/318b9aeca7b9856410ededa4f52d6f82174d1a41e64bdd70d951e532675a/colorspacious-1.1.2-py2.py3-none-any.whl
  sha256: c78befa603cea5dccb332464e7dd29e96469eebf6cd5133029153d1e69e3fd6f
requirements:
  run:
    - numpy
about:
  home: https://github.com/njsmith/colorspacious
  PyPI: https://pypi.org/project/colorspacious
  summary:
    A powerful, accurate, and easy-to-use Python library for doing colorspace
    conversions
  license: MIT
