Added suppression for leak in NSS SSLServerSocket handshake.

TBR=oshima@chromium.org
BUG=487706

Review URL: https://codereview.chromium.org/1136843007

Cr-Commit-Position: refs/heads/master@{#329772}

tools/valgrind/memcheck/suppressions.txt

@@ -3626,3 +3626,16 @@
    fun:_ZNK5blink14LayoutSVGShape26calculateStrokeBoundingBoxEv
    fun:_ZN5blink14LayoutSVGShape22updateShapeFromElementEv
 }
+{
+  bug_487706
+  Memcheck:Leak
+  fun:calloc
+  ...
+  fun:ssl3_HandleClientHello
+  fun:ssl3_HandleHandshakeMessage
+  fun:ssl3_HandleHandshake
+  fun:ssl3_HandleRecord
+  fun:ssl3_GatherCompleteHandshake
+  fun:SSL_ForceHandshake
+  fun:_ZN3net18SSLServerSocketNSS11DoHandshakeEv
+}