Add missing build dependencies to debian package.
Add missing build dependencies to debian package.

astmanproxy depends on libssl-dev for the SSL part, and, quite
obviously, on build-essential for the C compiler and stuff!

Signed-off-by: Steve Davies <19c43333dfc61cdeda8950fbc3d4c38e946ed1c5@gmail.com>

augcampos/astmanproxy