Silence tinderbox build.

Approved by:    stas (mentor)
ECN marking implenetation for dummynet.
Changes include both DCTCP and RFC 3168 ECN marking methodology.

DCTCP draft: http://tools.ietf.org/html/draft-bensley-tcpm-dctcp-00

Submitted by:	Midori Kato (aoimidori27@gmail.com)
Worked with:	Lars Eggert (lars@netapp.com)
Reviewed by:	luigi, hiren
Do only receive chars if there are some data in the buffer.
This fixes operation on newer Exynos boards.
Add support for Exynos 5420 Octa - 8-core
heterogeneous (big.LITTLE) ARM machine
(4 x Cortex-A15 @ 1.8Ghz, 4 x Cortex-A7 @ 1Ghz)

Add configuration for Arndale Octa development board