Install nslookup on Eglide

Summary:
There is a move to remove nslookup from standard utilities,
mainly because Bind isn't include by default anymore.

Yet, legacy applications and scripts still rely on it,
and so we install the relevant package including it.

Test Plan:
Packages names have been checked for Debian and FreeBSD.

Reviewers: dereckson

Subscribers: tomjerr

Differential Revision: https://devcentral.nasqueron.org/D708