Add myself and remove Sergey from tools/memory/OWNERS

Add myself and remove Sergey from tools/memory/OWNERS

Sergey presumably no longer works on Chromium, unless I'm mistaken.
I am probably a reasonably good reviewer for the ASan blacklist
changes here.

R=timurrrr@chromium.org,glider@chromium.org

Committed: https://crrev.com/eb1f9d7d1e0e4e7d2674a53c1077844564093128
Cr-Commit-Position: refs/heads/master@{#353332}

[Alexander Potapenko, 2015-10-09 17:56:55]

The CQ bit was checked by glider@chromium.org

[commit-bot: I haz the power, 2015-10-09 17:57:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1397113002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1397113002/1

[Alexander Potapenko, 2015-10-09 17:57:27]

On 2015/10/09 17:39:49, Reid Kleckner wrote:

LGTM

You can use NOTRY=true for non-code changes.

[commit-bot: I haz the power, 2015-10-09 18:14:46]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-09 18:15:44]

Patchset 1 (id:??) landed as
https://crrev.com/eb1f9d7d1e0e4e7d2674a53c1077844564093128
Cr-Commit-Position: refs/heads/master@{#353332}