util-linux: fix installation of shared libraries to not mess with pure static lib

Even when compiled with --enable-static --disable-shared, util-linux
creates some incorrect libuuid.so, libblkid.so and libmount.so
symbolic links, which confuses the compiler which thinks that a shared
library is available. This causes some build issues such as:

  http://autobuild.buildroot.org/results/990/9909d198ce14969d0e9d29a34fcc33f0ef79220d/

This commit fixes that by adding a patch to util-linux that fixes this
issue. The patch has been submitted upstream at
http://article.gmane.org/gmane.linux.utilities.util-linux-ng/9262

.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>