binutils: Updating OWNERS file.

I'm using tansell@chromium.org for my Chromium work now.

R=thakis@chromium.org,thestig@chromium.org,dmazzoni@chromium.org

Review-Url: https://codereview.chromium.org/2679063004
Cr-Original-Commit-Position: refs/heads/master@{#450232}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 1b4a66501fa0d4dcdc031a069453f7fb4b9f462a
1 file changed