src: use simdutf for converting externalized builtins to UTF-16

nodejs/node#46119

patches/node/build_add_gn_build_files.patch

@@ -7,10 +7,10 @@ This adds GN build files for Node, so we don't have to build with GYP.
 
 diff --git a/BUILD.gn b/BUILD.gn
 new file mode 100644
-index 0000000000000000000000000000000000000000..db80a8f00a84bf54f723c21300e7579c994d0514
+index 0000000000000000000000000000000000000000..5e8577795316984f3073204523d82a17f44b0f88
 --- /dev/null
 +++ b/BUILD.gn
-@@ -0,0 +1,438 @@
+@@ -0,0 +1,439 @@
 +import("//v8/gni/v8.gni")
 +import("node.gni")
 +
@@ -223,8 +223,9 @@ index 0000000000000000000000000000000000000000..db80a8f00a84bf54f723c21300e7579c
 +  deps = [
 +    ":node_js2c",
 +    "deps/googletest:gtest",
-+    "deps/uvwasi",
 +    "deps/base64",
++    "deps/simdutf",
++    "deps/uvwasi",
 +    "//third_party/zlib",
 +    "//third_party/brotli:dec",
 +    "//third_party/brotli:enc",
@@ -945,6 +946,30 @@ index 0000000000000000000000000000000000000000..23eed033d31eced6a85c794eee550655
 +    "lib/nghttp2_version.c",
 +  ]
 +}
+diff --git a/deps/simdutf/BUILD.gn b/deps/simdutf/BUILD.gn
+new file mode 100644
+index 0000000000000000000000000000000000000000..48c7aeb4f283249d6b3302184c2db34f648c21f8
+--- /dev/null
++++ b/deps/simdutf/BUILD.gn
+@@ -0,0 +1,18 @@
++config("simdutf_config") {
++  include_dirs = [ "." ]
++}
++
++static_library("simdutf") {
++  include_dirs = [ "." ]
++  sources = [
++    "simdutf.cpp",
++  ]
++
++  public_configs = [ ":simdutf_config" ]
++
++  cflags_cc = [
++    "-Wno-ambiguous-reversed-operator",
++    "-Wno-c++98-compat-extra-semi",
++    "-Wno-unused-function",
++  ]
++}
 diff --git a/deps/uv/BUILD.gn b/deps/uv/BUILD.gn
 new file mode 100644
 index 0000000000000000000000000000000000000000..d6bed57461820ce08391fc424a1f842bd282fa75