Revert "Revert lib/memcopy and lib/string"

This reverts commit 191a1fb7288b135482f0a5bdaa473ec7c686bc78.
Revert to stock voltage

Signed-off-by: Keff <funnykeff91@gmail.com>
sched: Fix loadavg calculations

patch from @DerTeufel, @AndreiLux, and @voku also