[OE-core] [morty][PATCH] gcc-6.2: backport fix of check for empty string in ubsan.c

[Cody P Schafer]

On Wed, Jun 7, 2017 at 2:46 PM, Cody P Schafer <dev at codyps.com> wrote:
> From: Joshua Lock <joshua.g.lock at intel.com>
>
> Building gcc-cross-initial with GCC7 on the host fails due to the
> comparison of a pointer to an integer in ubsan_use_new_style_p, which
> is forbidden by ISO C++:

The patch to oe-core master was for gcc 6.3, I've modified it to apply
to gcc 6.2 (which is in morty).

We probably also need to backport the CVE patch, and examine the
6.2..6.3 log to see if there are any other critical patches. Or just
put gcc 6.3 into morty.

This at just gets gcc building for me again.