buildroot

elfutils: security bump to version 0.169

Fixes a number of security issues: CVE-2017-7607, CVE-2017-7608,
CVE-2017-7609, CVE-2017-7610, CVE-2017-7611, CVE-2017-7612, CVE-2017-7613.

Rebase patches, and convert to git format.

Remove --disable-werror; unrecognized configure option.

Use upstream provided hash.

Cc: Stefan Fröberg <stefan.froberg@petroprogram.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>