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>

util/board_status/board_status.sh

@@ -60,10 +60,16 @@ _cmd()
 		return $EXIT_FAILURE
 	fi
 
-	if [ "$1" -eq "$REMOTE" ] && [ -n "$REMOTE_HOST" ]; then
-		ssh root@${REMOTE_HOST} "$2" > "${3}" 2>&1
+	if [ -n "$3" ]; then
+		pipe_location="${3}"
 	else
-		$2 > "${3}" 2>&1
+		pipe_location="/dev/null"
+	fi
+
+	if [ "$1" -eq "$REMOTE" ] && [ -n "$REMOTE_HOST" ]; then
+		ssh root@${REMOTE_HOST} "$2" > "$pipe_location" 2>&1
+	else
+		$2 > "$pipe_location" 2>&1
 	fi
 
 	return $?