Adjust {,un}blocked_terms.txt to avoid matching "alternative"

The regexp /native/ matches things like "alternative", which is not
intended to be a blocked term. This change adds word boundaries to
the regexp so that it only matches "native".

BUG=None
TEST=Ran searched_blocked_words.sh on code that contains "alternatively".

Change-Id: I9888ea68d25b16b922d3abc1ac7bba7c98ef38d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/repohooks/+/2419228
Tested-by: Bob Haarman <inglorion@chromium.org>
Reviewed-by: Bernie Thompson <bhthompson@chromium.org>
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-by: Alex Klein <saklein@chromium.org>
Commit-Queue: Bob Haarman <inglorion@chromium.org>
diff --git a/blocked_terms.txt b/blocked_terms.txt
index 544013a..721f5e7 100644
--- a/blocked_terms.txt
+++ b/blocked_terms.txt
@@ -23,7 +23,7 @@
 man.?in.?the.?middle
 master
 mitm
-native
+\bnative\b
 red.?line
 rtfm
 sane
diff --git a/unblocked_terms.txt b/unblocked_terms.txt
index df8af67..6b49613 100644
--- a/unblocked_terms.txt
+++ b/unblocked_terms.txt
@@ -34,7 +34,7 @@
 man.?in.?the.?middle
 master
 mitm
-native
+\bnative\b
 red.?line
 rtfm
 sane