Add summary to search_blocked_terms.sh

Show the total number of infractions so it's easier for developers to
check if any were found at all.

BUG=None
TEST=Ran script on platform2/modemfwd and added some blocked words to
check that the summary includes those words.

Change-Id: I9087d24221bbac42efc9652a1f69089c5db3654c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2824006
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
Commit-Queue: Andrew Lassalle <andrewlassalle@chromium.org>
Tested-by: Andrew Lassalle <andrewlassalle@chromium.org>
Auto-Submit: Andrew Lassalle <andrewlassalle@chromium.org>
1 file changed