Patch merged into serialice/master: qemu-0.15.x/serialice-com: Add ECHO_MODE define

the following patch was just integrated into master:
commit 73d9c63968bd15f3ed3c7e8a05d9ea2687364d2f
Author: Patrick Rudolph 
Date:   Mon Apr 25 12:21:03 2016 +0200

qemu-0.15.x/serialice-com: Add ECHO_MODE define

The serialice console has this define too.
    Make sure not to wait for remote echo if it never sends
    an echo character.

Fixes a problem where qemu is waiting forever to receive
    an echo character.

Change-Id: I8d8fce350c63b3e38ee02589cd1564aea95e50bd
    Signed-off-by: Patrick Rudolph 
    Reviewed-on: https://review.coreboot.org/14509
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth

See https://review.coreboot.org/14509 for details.

-gerrit