doc: README.me -> README.md

An early morning typo.

Signed-off-by: Paul Jolly <[email protected]>
Change-Id: I799b36b61879f04056f948272fdb412083b98cdc
Dispatch-Trailer: {"type":"trybot","CL":1200539,"patchset":1,"ref":"refs/changes/39/1200539/1","targetBranch":"master"}

Author: myitcv