Airskiff: add deps needed for a fresh install

When running the 020-setup-client.sh script on a new ubuntu 16.04 VM,
the gcc, python-dev, and python-setuptools  apt packages are required
for pip to install the cmd2 package.

Change-Id: Id4f46e7e0c6c607ffc660b8a26f17dbbbb340f4c

tools/deployment/airskiff/developer/000-install-packages.sh

@@ -43,6 +43,9 @@ sudo apt-get install --allow-downgrades --no-install-recommends -y \
         uuid-runtime \
         apt-transport-https \
         ca-certificates \
+        gcc \
+        python-dev \
+        python-setuptools \
         software-properties-common
 
 # Enable apparmor