valgrind: update to 3.10.1 and fix kernel >= 4.0

This updates valgrind to version 3.10.1 and make configure work with
kernel version > 4.0. This patch was taken from upstream valgrind.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46302 3c298f89-4303-0410-b956-a3cf2f4a3e73