Set and export linuxconsoleargs variable for subsidiary configfile loads.

We only want to have to hardcode the console info in the initial
configfile, not in any network-loaded (bootinfo) config files.  Those
can now reference this variable in the linux command line to get the
console set according to the initial grub2pxe configuration.
3 jobs for master in 49 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
failed #2814
build

00:00:49

 
  Test
skipped #2816
allowed to fail
code_quality
skipped #2815
test
 
Name Stage Failure
failed
build Build There is an unknown failure, please try again
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store

Login Succeeded

Building Heroku-based application using gliderlabs/herokuish docker image...
docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.
See 'docker run --help'.
ERROR: Job failed: exit code 125