[PATCH] gcc: xtensa: enable address sanitizer

[augustine.sterling@gmail.com]

On Mon, Dec 4, 2017 at 1:28 PM, Max Filippov <jcmvbkbc@gmail.com> wrote:
> gcc/
> 2017-12-04  Max Filippov  <jcmvbkbc@gmail.com>
>
>         * config/xtensa/xtensa.c (xtensa_asan_shadow_offset): New
>         function.
>         (TARGET_ASAN_SHADOW_OFFSET): New macro definition.
>         * config/xtensa/xtensa.h (FRAME_GROWS_DOWNWARD): Set to 1 if
>         ASAN is enabled.

This is OK.