Add oppressive language presubmit

BUG=b:162024466
TEST=try to upload a CL with a blocked term

Change-Id: I7f224b2563cbf06f00f069f4c310cb96d10286bb
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/mttools/+/2664794
Tested-by: Harry Cutts <hcutts@chromium.org>
Auto-Submit: Harry Cutts <hcutts@chromium.org>
Reviewed-by: Sean O'Brien <seobrien@chromium.org>
Commit-Queue: Harry Cutts <hcutts@chromium.org>
diff --git a/unblocked_terms.txt b/unblocked_terms.txt
new file mode 100644
index 0000000..abd8816
--- /dev/null
+++ b/unblocked_terms.txt
@@ -0,0 +1,37 @@
+# KEEP THIS COMMENT IN YOUR COPY.
+#
+# Don't delete this file if you want to keep keyword_check enabled even if it's
+# empty.
+#
+# See repohooks/README.md for more details.
+
+# black.?hat
+# black.?list
+# build.?cop
+# crazy
+# cripple
+dummy
+# first.?class.?citizen
+# grandfathered
+# gr[ae]y.?hat
+# gr[ae]y.?list
+# \bhe\b
+# \bshe\b
+# \bhim\b
+# \bher\b
+# \bhis\b
+# \bhers\b
+# man.?in.?the.?middle
+# master
+# \bmitm(\b|\d)
+# \bnative
+# \bred.?line
+rtfm
+# \b(in)?sane(\b|\d)
+sanity
+# slave
+# white.?glove
+# white.?hat
+# white.?label
+# white.?list
+# \bwtf