Fix lint issues on search_blocked_terms.sh

BUG=None
TEST=Ran the script on src/platform2 before and after my changes and
verified the results were the same.

Change-Id: If7aae1ac8400c6e3f922b3206fd8a2f82e25899a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2824005
Tested-by: Andrew Lassalle <andrewlassalle@chromium.org>
Auto-Submit: Andrew Lassalle <andrewlassalle@chromium.org>
Commit-Queue: Andrew Lassalle <andrewlassalle@chromium.org>
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
1 file changed