board_status.sh allow cmd() to not save output

- allow for cmd() to be run, but not pipe to a file.

Change-Id: I3e1650e421a49a06218e082ceb5a60b7b4808ce8
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/6258
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
board_status.sh: name temp dir and print the name

- give a template to the temp dir so they're recognizable.
- show the location of the temp files again at the end of the script.

Change-Id: Ieb031ee249043697f6a75e42284c23d0b9bad1b3
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/6259
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Tested-by: build bot (Jenkins)
board_status.sh: Read coreboot boot log from a serial device

- Read the boot log from a serial device.

Change-Id: I9daf97fd9b7fc55d0d56d815b185f9b4e3ef9f5a
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/6260
Reviewed-by: Mike Loptien <mike.loptien@se-eng.com>
Tested-by: build bot (Jenkins)
board_status.sh minor fixes - no functional changes

- Update some comments
- Whitespace fixes
- change from backticks to $() format for getting command data.

Change-Id: Iaf424224abfd30a3581d0e43a1689cc7c887beec
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/6261
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: David Hendricks <dhendrix@chromium.org>