[turbofan] Introduce graph assembler to build effect-control-linearizer sub-graphs.

BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
@@ skipping 1049 matching lines @@
     "src/compiler/escape-analysis.cc",
     "src/compiler/escape-analysis.h",
     "src/compiler/frame-elider.cc",
     "src/compiler/frame-elider.h",
     "src/compiler/frame-states.cc",
     "src/compiler/frame-states.h",
     "src/compiler/frame.cc",
     "src/compiler/frame.h",
     "src/compiler/gap-resolver.cc",
     "src/compiler/gap-resolver.h",
+    "src/compiler/graph-assembler.cc",
+    "src/compiler/graph-assembler.h",
     "src/compiler/graph-reducer.cc",
     "src/compiler/graph-reducer.h",
     "src/compiler/graph-replay.cc",
     "src/compiler/graph-replay.h",
     "src/compiler/graph-trimmer.cc",
     "src/compiler/graph-trimmer.h",
     "src/compiler/graph-visualizer.cc",
     "src/compiler/graph-visualizer.h",
     "src/compiler/graph.cc",
     "src/compiler/graph.h",
@@ skipping 1924 matching lines @@
   ]
 
   configs = [
     ":external_config",
     ":internal_config_base",
   ]
 }
 
 v8_fuzzer("wasm_data_section_fuzzer") {
 }