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- [x] Add new / update outdated documentation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: pyinstrument
  version: 4.4.0
  top-level:
    - pyinstrument
source:
  url: https://files.pythonhosted.org/packages/9a/f8/1feae9239316e073dcdc53e6d1ffbd3d02bb2e0d3a755bc61439a6264221/pyinstrument-4.4.0.tar.gz
  sha256: be34a2e8118c14a616a64538e02430d9099d5d67d8a370f2888e4ac71e52bbb7
about:
  home: https://github.com/joerick/pyinstrument
  PyPI: https://pypi.org/project/pyinstrument
  summary: Call stack profiler for Python. Shows you why your code is slow!
  license: "BSD-3-Clause"

package:
  name: pyinstrument
  version: 4.4.0
  top-level:
    - pyinstrument
source:
  url: https://files.pythonhosted.org/packages/9a/f8/1feae9239316e073dcdc53e6d1ffbd3d02bb2e0d3a755bc61439a6264221/pyinstrument-4.4.0.tar.gz
  sha256: be34a2e8118c14a616a64538e02430d9099d5d67d8a370f2888e4ac71e52bbb7
about:
  home: https://github.com/joerick/pyinstrument
  PyPI: https://pypi.org/project/pyinstrument
  summary: Call stack profiler for Python. Shows you why your code is slow!
  license: "BSD-3-Clause"
