crosh: fix +x bits on README.md

Not sure how these got set, but def wrong, and messes up rendering.

BUG=chromium:640401
TEST=reviewed output in gitiles

Change-Id: I82c7fde836fa3dce5dc1b7c414ee989380d97cce
Reviewed-on: https://chromium-review.googlesource.com/383191
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
1 file changed