Add a flag for printf debugging the compiler dispatcher

src/flag-definitions.h

Index: src/flag-definitions.h
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index 971879a23f02089da0115f28f5f6d54e244f99ae..e1c075930c178c04969b32e7aca161bfcd04d2b4 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -669,6 +669,13 @@ DEFINE_BOOL(cache_prototype_transitions, true, "cache prototype transitions")
 
 // compiler-dispatcher.cc
 DEFINE_BOOL(compiler_dispatcher, false, "enable compiler dispatcher")
+DEFINE_BOOL(trace_compiler_dispatcher, false,
+            "trace compiler dispatcher activity")
+
+// compiler-dispatcher-job.cc
+DEFINE_BOOL(
+    trace_compiler_dispatcher_jobs, false,
+    "trace progress of individual jobs managed by the compiler dispatcher")
 
 // cpu-profiler.cc
 DEFINE_INT(cpu_profiler_sampling_interval, 1000,