Add a basic compiler dispatcher

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 1a9ee2aedcacff78d3525890c4340b421a828209..ce2b404b47cc47c813ca68effb6e78e3ae2094ee 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1001,6 +1001,8 @@ v8_source_set("v8_base") {
     "src/compiler-dispatcher/compiler-dispatcher-job.h",
     "src/compiler-dispatcher/compiler-dispatcher-tracer.cc",
     "src/compiler-dispatcher/compiler-dispatcher-tracer.h",
+    "src/compiler-dispatcher/compiler-dispatcher.cc",
+    "src/compiler-dispatcher/compiler-dispatcher.h",
     "src/compiler-dispatcher/optimizing-compile-dispatcher.cc",
     "src/compiler-dispatcher/optimizing-compile-dispatcher.h",
     "src/compiler.cc",