C: add Jeremiah Harmsen (Google CLA)

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/9229043

CONTRIBUTORS

@@ -214,6 +214,7 @@ Jean-Marc Eurin <jmeurin@google.com>
 Jeff Hodges <jeff@somethingsimilar.com>
 Jeff R. Allen <jra@nella.org> <jeff.allen@gmail.com>
 Jeff Wendling <jeff@spacemonkey.com>
+Jeremiah Harmsen <jeremiah@google.com>
 Jeremy Jackins <jeremyjackins@gmail.com>
 Jeremy Schlatter <jeremy.schlatter@gmail.com>
 Jim McGrath <jimmc2@gmail.com>