howto-compile-linux: Add Wheezy/Squeeze sections

Add Wheezy and Squeeze sections under "Install the prerequisites".

The required "libjson-glib-dev" package (0.12+) is available starting
from Wheezy. The one Squeeze provides is outdated and does not implement
the features that quvi(1) uses. Add a note about this under the Squeeze
section.

Other:
* Revise the note about the lua-socket package for Wheezy
* FIX: Squeeze: liblua5.1-expat0 package name

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>