Can be overridden from the environment by setting WERROR=0
also remove reversed logic for Werror in Makefile.buildtest
(a typo caused Werror to be always enabled for all builds)
- Better support for passing environment variables to the Docker container.
- Move Docker-related definitions into Makefile.docker.
- Only environment variables that originates from the command line or
the environment will be passed to the Docker container.