Change proto generation to match new layout.

Change the protocol buffer generation to match the new repo layout with
all the protos in a single directory structure.

BUG=chromium:1041872
TEST=./generate.sh

Change-Id: I6f221bb85f2b3a884c9faa27f48d4ec742fd2a4c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/config/+/2055732
Tested-by: David Burger <dburger@chromium.org>
Commit-Queue: David Burger <dburger@chromium.org>
Reviewed-by: Andrew Lamb <andrewlamb@chromium.org>
22 files changed