Add warmup to SpreadCallsGeneral benchmarks.

Since the benchmark is very fast, a warmup is useful to reduce the noise
created by optimization.

Change-Id: I4902c5c1695099be766d0fcc563c2f5d0892d3a9
Reviewed-on: https://chromium-review.googlesource.com/1204112
Commit-Queue: Hai Dang <dhai@google.com>
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55618}

test/js-perf-test/SpreadCallsGeneral/run.js

@@ -64,6 +64,6 @@ CreateBenchmark('ApplySpreadLiteral', ApplySpreadLiteral);
 CreateBenchmark('SpreadCall', SpreadCall);
 CreateBenchmark('SpreadCallSpreadLiteral', SpreadCallSpreadLiteral);
 
-BenchmarkSuite.config.doWarmup = undefined;
+BenchmarkSuite.config.doWarmup = true;
 BenchmarkSuite.config.doDeterministic = undefined;
 BenchmarkSuite.RunSuites({NotifyResult: PrintResult, NotifyError: PrintError});