Merge more Kernel infrastructure from kernel_sdk SDK fork.

BUILD.gn

 # Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # This target will be built if no target is specified when invoking ninja.
 group("default") {
   deps = [
     ":runtime",
   ]
 }
@@ skipping 11 matching lines @@
 }
 
 group("runtime") {
   deps = [
     "runtime/bin:dart",
     "runtime/bin:dart_bootstrap($host_toolchain)",
     "runtime/bin:run_vm_tests",
     "runtime/bin:process_test",
     "runtime/bin:test_extension",
     "runtime/bin:sample_extension",
+    "runtime/vm:patched_sdk",
   ]
 }
 
 group("runtime_precompiled") {
   deps = [
     "runtime/bin:dart_precompiled_runtime",
     "runtime/bin:dart_bootstrap($host_toolchain)",
+    "runtime/vm:patched_sdk",
   ]
 }
 
 group("runtime_and_noopt") {
   deps = [
     "runtime/bin:dart",
     "runtime/bin:dart_noopt",
     "runtime/bin:dart_bootstrap($host_toolchain)",
     "runtime/bin:run_vm_tests",
     "runtime/bin:process_test",
     "runtime/bin:test_extension",
     "runtime/bin:sample_extension",
+    "runtime/vm:patched_sdk",
   ]
 }
 
 
 action("create_sdk") {
   deps = [
     "runtime/bin:dart",
     "utils/analysis_server",
     "utils/compiler:dart2js",
     "utils/dartanalyzer:generate_dartanalyzer_snapshot",
@@ skipping 87 matching lines @@
   deps = [
     ":create_sdk"
   ]
 }
 
 group("samples") {
   deps = [
     "runtime/bin:sample_extension"
   ]
 }