cleanup: Fix some typos in comments

No code changes, just fix a few spelling errors and change C++
style comments to C-style.

BUG=none
BRANCH=none
TEST=make runtests

Change-Id: I153f821a3f42a92867c7dc4761a2bcde7f2518c4
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/256123
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
10 files changed