C: add Iskander Sharipov's individual CLA mail

Change-Id: I2e58e20e26674175b3e35b6c8a05998a93db4646
Reviewed-on: https://go-review.googlesource.com/107215Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

CONTRIBUTORS

@@ -641,7 +641,7 @@ Ingo Krabbe <ikrabbe.ask@gmail.com>
 Ingo Oeser <nightlyone@googlemail.com> <nightlyone@gmail.com>
 Irieda Noboru <irieda@gmail.com>
 Isaac Wagner <ibw@isaacwagner.me>
-Iskander Sharipov <iskander.sharipov@intel.com>
+Iskander Sharipov <iskander.sharipov@intel.com> <quasilyte@gmail.com>
 Ivan Babrou <ivan@cloudflare.com>
 Ivan Bertona <ivan.bertona@gmail.com>
 Ivan Krasin <krasin@golang.org>