meta-phytec

tools: phytec-setup-release: Use sample conf files to configure build environment

Since only one machine is currently supported in this meta layer
(imx7-phyboard-zeta), can use sample configuration files to set up
the build environment.

Signed-off-by: Anna Horstmann <ahorstmann@phytec.com>
(cherry picked from commit 98c2d91f0a8641ca84c4497ab094f777db485c7e)