Not removing or modifying (outside of prefix)

[pjw91]

Environment: HEAD(currently 79a2667)

Process:

1. install django through wheel
2. clone venv(v1 -> v2)
3. uninstall django from v2
   =>it says:

Not removing or modifying (outside of prefix)
/run/shm/v1/bin/django-admin

When install a wheel with executable script,
(eg. package django has the script django-admin installed to v1/bin/ registered by entry_points.txt)
there's will be a record/line in Django-1.8.2.dist-info/RECORD saying
/run/shm/v1/bin/django-admin,sha256=OhnVC0qu9vUaGIQ8FdZ2det2wZFRNckxaQVkGcSWGRA,272.

After cpvenv from v1 to v2, that line is still v1.

This is the source of this bug.

However, the django-admin and django-admin.py are removed from v2 correctly.
Therefore, currently this is just a annoying message causing nothing wrong