Reintroduce binary to load and save dill file.

runtime/bin/BUILD.gn

Index: runtime/bin/BUILD.gn
diff --git a/runtime/bin/BUILD.gn b/runtime/bin/BUILD.gn
index 856f8e68c0d41434bdcfabb8cc90d46f42c700c2..49363dc8d2bc88066e109dde029bb46a847df68a 100644
--- a/runtime/bin/BUILD.gn
+++ b/runtime/bin/BUILD.gn
@@ -818,6 +818,74 @@ executable("run_vm_tests") {
   }
 }
 
+executable("kernel") {
+  extra_deps = [
+    "..:libdart",
+    ":dart_snapshot_cc",
+  ]
+  extra_sources = [ "builtin_nolib.cc" ]
+
+  configs += [
+    "..:dart_config",
+    "..:dart_maybe_product_config",
+  ]
+
+  if (defined(is_fuchsia_host) && is_fuchsia_host) {
+    # We already have these in the standalone build, but Fuchsia doesn't
+    # have them. They are needed for running Fuchsia binaries built for the
+    # host.
+    if (is_linux) {
+      configs += [ "../../build/config/gcc:executable_ldconfig" ]
+    } else if (is_mac) {
+      configs += [ "../../build/config/mac:mac_dynamic_flags" ]
+    }
+  }
+
+  deps = [
+           ":gen_resources_cc",
+           ":standalone_dart_io",
+           ":libdart_builtin",
+           "$dart_zlib_path",
+         ] + extra_deps
+
+  defines = []
+
+  if (dart_use_tcmalloc) {
+    deps += [ "//third_party/tcmalloc" ]
+    defines += [ "DART_USE_TCMALLOC" ]
+  }
+
+  sources = [
+              "../vm/kernel_main.cc",
+              "$target_gen_dir/resources_gen.cc",
+            ] + extra_sources
+
+  include_dirs = [
+    "..",
+    "//third_party",
+  ]
+
+  if (is_win) {
+    ldflags = [ "/EXPORT:Dart_True" ]
+  } else {
+    ldflags = [ "-rdynamic" ]
+  }
+
+  if (is_win) {
+    libs = [
+      "iphlpapi.lib",
+      "psapi.lib",
+      "ws2_32.lib",
+      "Rpcrt4.lib",
+      "winmm.lib",
+    ]
+  }
+
+  if (defined(is_fuchsia) && is_fuchsia) {
+    libs = [ "launchpad" ]
+  }
+}
+
 shared_library("test_extension") {
   deps = [
     ":dart",