Add Vignesh Venkatasubramanian to .mailmap

Bug: aomedia:3577
Change-Id: I143c6f596b635096988dc3dde8395fa45b134170

.mailmap

diff --git a/.mailmap b/.mailmap
index 7a39c5b..e34285c 100644
--- a/.mailmap
+++ b/.mailmap
@@ -99,6 +99,7 @@
 Tom Finegan <tomfinegan@google.com> <tomfinegan@chromium.org>
 Tristan Matthews <tmatth@videolan.org> <le.businessman@gmail.com>
 Venkat Sanampudi <sanampudi.venkatarao@ittiam.com>
+Vignesh Venkatasubramanian <vigneshv@google.com>
 Vitalii Dziumenko <vdziumenko@luxoft.com> <vdziumenko@luxoft.corp-partner.google.com>
 Wei-Ting Lin <weitinglin@google.com>
 Wei-Ting Lin <weitinglin@google.com> <weitingco@gmail.com>