Whilst we don't usually take linux-libc-headers point release, 3.17.3
fixes a userspace header issue which caused gdb to fail to build on
mips. We therefore may as well upgrade to the latest point release.
(From OE-Core rev: f08a67b451091fcdc84b6b8b1627a8c9589e0ef3)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
