Add tsan suppression for gamepad unittest code

tools/valgrind/tsan/suppressions.txt

Index: tools/valgrind/tsan/suppressions.txt
diff --git a/tools/valgrind/tsan/suppressions.txt b/tools/valgrind/tsan/suppressions.txt
index e31b057534c539ab40387e99395dbf5dbbb4e111..f1e2cec5201f29bf6f3a171396ff04aeddd31ded 100644
--- a/tools/valgrind/tsan/suppressions.txt
+++ b/tools/valgrind/tsan/suppressions.txt
@@ -392,6 +392,14 @@
    fun:base::StatisticsRecorder::FindHistogram
    fun:base::*Histogram::FactoryGet
 }
+{
+  bug_79050 Test to detect read contention & benign race
+  ThreadSanitizer:Race
+  fun:Replace_memcpy
+  fun:memcpy
+  fun:::MockDataFetcher::GetGamepadData
+  fun:gamepad::Provider::DoPoll
+}
 
 # 3. Suppressions for real chromium bugs that are not yet fixed.
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