Add msarett to zlib OWNERs

NOTRY=true

BUG=

Review-Url: https://codereview.chromium.org/2688893003
Cr-Original-Commit-Position: refs/heads/master@{#449782}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 318473ffcb37f2ec016d76c2907eb65570aff682
1 file changed