TSAN: Fix bad suppression from r372233.

BUG=582274
TBR=glider@chromium.org

Review URL: https://codereview.chromium.org/1643093002

Cr-Commit-Position: refs/heads/master@{#372253}

build/sanitizers/tsan_suppressions.cc

@@ -287,7 +287,7 @@ char kTSanDefaultSuppressions[] =
 "deadlock:mojo::edk::MessagePipeDispatcher::TransportStarted\n"
 
 // http://crbug.com/582274
-"usrsctp_close\n"
+"race:usrsctp_close\n"
 
 // End of suppressions.
 ;  // Please keep this semicolon.