[SerialICE] Patch merged into serialice/master: qemu-0.15.x/serialice-com: Return I/O errors

the following patch was just integrated into master:
commit dc23a269060880f506ec56ca1dd3241a5a64e92d
Author: Patrick Rudolph 
Date:   Mon Apr 25 12:19:39 2016 +0200

qemu-0.15.x/serialice-com: Return I/O errors

Return I/O erros to calling function.
    Return -1 in serialice_write and serialice_read.

Change-Id: I168093eaad897f2998c055e46acd88fe6a263947
    Signed-off-by: Patrick Rudolph 
    Reviewed-on: https://review.coreboot.org/14508
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth

See https://review.coreboot.org/14508 for details.

-gerrit