prelink: apply patch for ARM IFUNC support

From Julian Brown, see
http://sourcery.sje.mentorg.com/pipermail/gnu-arm-releases/2014-April/015072.html.

This should really go upstream, to oe-core, prelink-cross, or prelink.

JIRA: MEIBPADIT-793

Signed-off-by: Christopher Larson <kergoth@gmail.com>
Merge pull request #155 from kergoth/prelink-arm-ifunc

prelink: apply patch for ARM IFUNC support