Add comment for DIST_TARGET.
Add comment for DIST_TARGET.

insertinterestingnamehere/dynd-python,mwiebe/dynd-python,mwiebe/dynd-python,insertinterestingnamehere/dynd-python,insertinterestingnamehere/dynd-python,ContinuumIO/dynd-python,izaid/dynd-python,ContinuumIO/dynd-python,ContinuumIO/dynd-python,izaid/dynd-python,ContinuumIO/dynd-python,izaid/dynd-python,mwiebe/dynd-python,mwiebe/dynd-python,insertinterestingnamehere/dynd-python,izaid/dynd-python