Add kmb to bazel contributors
RELNOTES: none
@@ -17,6 +17,7 @@ Anthony Bellissimo <twon33@gmail.com>
Lukacs Berki <lberki@google.com>
Paul Bethe <pbethe@google.com>
Shreya Bhattarai <shreyax@google.com>
+Kevin Bierhoff <kmb@google.com>
Klaas Boesche <klaasb@google.com>
Phil Bordelon <sunfall@google.com>
Jon Brandvein <brandjon@google.com>
