lint: handle more section typos

BUG=None
TEST=`cros lint` caught more bad lines

Change-Id: I1a4c94a9e7cdd51b6fd482a3b4546c11e45a870b
Reviewed-on: https://chromium-review.googlesource.com/387486
Reviewed-by: Allen Li <ayatane@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
5 files changed