[HACK] Implement getting current time in NodePlatform

It's required by an upcoming change in V8:
https://chromium-review.googlesource.com/c/v8/v8/+/598666

src/node_platform.cc

@@ -137,6 +137,10 @@ double NodePlatform::MonotonicallyIncreasingTime() {
   return uv_hrtime() / 1e9;
 }
 
+double NodePlatform::CurrentClockTimeMillis() {
+  return SystemClockTimeMillis();
+}
+
 TracingController* NodePlatform::GetTracingController() {
   return tracing_controller_.get();
 }

src/node_platform.h

@@ -52,6 +52,7 @@ class NodePlatform : public v8::Platform {
                                      double delay_in_seconds) override;
   bool IdleTasksEnabled(v8::Isolate* isolate) override;
   double MonotonicallyIncreasingTime() override;
+  double CurrentClockTimeMillis() override;
   v8::TracingController* GetTracingController() override;
 
  private: