Update suppression for pulse audio tsan issues.

Seems the signature for this has changed slightly for some reason.

BUG=244856,757162
TEST=no more race

Change-Id: Ia733eb93e65e27a93d978c2b15e5901549335e5b
Reviewed-on: https://chromium-review.googlesource.com/683156Reviewed-by: Alexander Potapenko <glider@chromium.org>
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#504713}

build/sanitizers/tsan_suppressions.cc

@@ -85,6 +85,7 @@ char kTSanDefaultSuppressions[] =
 
     // http://crbug.com/244856
     "race:AutoPulseLock\n"
+    "race:pulse::InitPulse\n"
 
     // http://crbug.com/246968
     "race:webrtc::VideoCodingModuleImpl::RegisterPacketRequestCallback\n"