util-linux-dmesg: Add missing install section

Package util-linux-dmesg is broken (at least) in Barrier Breaker git repo
as you can select it within menuconfig, it will compile (as a part of
util-linux) but it will not install as install section is missing from
package Makefile.

Signed-off-by: Tomasz Wasiak <tjwasiak@gmail.com>

SVN-Revision: 43069