buildroot

glibc: backport patch to fix Microblaze build issue

This commit backports a glibc patch that fixes the build of glibc 2.22
on the Microblaze architecture.

Fixes:

  http://autobuild.buildroot.org/results/673/67348953fac469affd1965e04d61485ebb41e252/

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