Add Jeremy Roman to platform/OWNERS
Add Jeremy Roman to platform/OWNERS

Jeremy has his 93 commits in platform/
https://blink.lc/blink/log/Source/platform?qt=author&q=jbroman

BUG=None

Review URL: https://codereview.chromium.org/1346223002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@202361 bbb929c8-8fbe-4397-9dbb-9b2b20218538

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk