MFC r326136: bfd: avoid crash on corrupt binaries

From binutils commits 5a4b0ccc20ba30caef53b01bee2c0aaa5b855339 and
7e1e19887abd24aeb15066b141cdff5541e0ec8e, made available under GPLv2
by Nick Clifton.

PR: 198824
Security: CVE-2014-8501
Security: CVE-2014-8502

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Merge binutils 2.17.50 to head. This brings a number of improvements to
x86 CPU support, better support for powerpc64, some new directives, and
many other things. Bump __FreeBSD_version, and add a note to UPDATING.

Thanks to the many people that have helped to test this.

Obtained from: projects/binutils-2.17

This commit was generated by cvs2svn to compensate for changes in r130561,
which included commits to RCS files with non-trunk default branches.

Import of Binutils from the FSF 2.15 branch (just post-.0 release).
These bits are taken from the FSF anoncvs repo on 23-May-2004 04:41:00 UTC.

Import of Binutils from the FSF 2.13 branch (just pre-.1 release).
These bits are taken from the FSF anoncvs repo on 11-Oct-2002 22:39:35 PDT.

Import of Binutils from the FSF 2.12 branch (pre-.0 release).

These bits are taken from the FSF anoncvs repo on 21-Feburary-2002 20:15 PST.

Enlist the FreeBSD-CURRENT users as testers of what is to become Binutils
version 2.12.0. These bits are taken from the FSF anoncvs repo on
27-January-2002 03:41 PST.

Halloween import of Binutils from the FSF 2.11 branch.
This fixes some IA-64 related bugs.

Import of GNU Binutils version 2.11.2.