elfutils: update to 0.155

Based on patch from Vadim A. Misbakh-Soloviov <mva@mva.name>

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/packages@35311 3c298f89-4303-0410-b956-a3cf2f4a3e73