freetype: C: add R?my Oudompheng's gmail.com address.

I fail at copy/pasting from the main Go repo.

R=adg, remyoudompheng
CC=golang-dev
https://codereview.appspot.com/14960051

CONTRIBUTORS

@@ -29,7 +29,7 @@
 Andrew Gerrand <adg@golang.org>
 Jeff R. Allen <jra@nella.org> <jeff.allen@gmail.com>
 Nigel Tao <nigeltao@golang.org>
-Rémy Oudompheng <oudomphe@phare.normalesup.org>
+Rémy Oudompheng <oudomphe@phare.normalesup.org> <remyoudompheng@gmail.com>
 Rob Pike <r@golang.org>
 Roger Peppe <rogpeppe@gmail.com>
 Russ Cox <rsc@golang.org>