[libFuzzer] control the reload interval by a flag, make it 10 seconds by default

llvm-svn: 283676
diff --git a/llvm/lib/Fuzzer/FuzzerFlags.def b/llvm/lib/Fuzzer/FuzzerFlags.def
index ea998bb..03db9ad 100644
--- a/llvm/lib/Fuzzer/FuzzerFlags.def
+++ b/llvm/lib/Fuzzer/FuzzerFlags.def
@@ -56,9 +56,9 @@
 FUZZER_FLAG_INT(workers, 0,
             "Number of simultaneous worker processes to run the jobs."
             " If zero, \"min(jobs,NumberOfCpuCores()/2)\" is used.")
-FUZZER_FLAG_INT(reload, 1,
-                "Reload the main corpus periodically to get new units"
-                " discovered by other processes.")
+FUZZER_FLAG_INT(reload, 10,
+                "Reload the main corpus every <N> seconds to get new units"
+                " discovered by other processes. If 0, disabled")
 FUZZER_FLAG_INT(report_slow_units, 10,
     "Report slowest units if they run for more than this number of seconds.")
 FUZZER_FLAG_INT(only_ascii, 0,