Update the build guide instructions to Debian. Debian build
instructions come from the wiki:
https://wiki.openstack.org/wiki/StarlingX/DebianBuildEnvironment
Also update the references that points to the old build_guide to
match the new one.
Test Plan:
PASS: build build_guide html page using tox
PASS: build_guide formatting looks ok
PASS: execute tox without link warnings/failing on outdated links
Story: 2011038
Task: 50009
Signed-off-by: Fabricio Henrique Ramos <fabriciohenrique.ramos@windriver.com>
Change-Id: I871a4c205a4fa507cecae933e8a3b271b3ef2956
81f6e935c1