deps: add simdutf dependency

Makefile

@@ -170,6 +170,7 @@ with-code-cache test-code-cache:
 
 out/Makefile: config.gypi common.gypi node.gyp \
 	deps/uv/uv.gyp deps/llhttp/llhttp.gyp deps/zlib/zlib.gyp \
+	deps/simdutf/simdutf.gyp \
 	tools/v8_gypfiles/toolchain.gypi tools/v8_gypfiles/features.gypi \
 	tools/v8_gypfiles/inspector.gypi tools/v8_gypfiles/v8.gyp
 	$(PYTHON) tools/gyp_node.py -f make

deps/simdutf/simdutf.gyp

@@ -0,0 +1,27 @@
+{
+  'targets': [
+    {
+      'target_name': 'simdutf',
+      'type': 'static_library',
+      'include_dirs': ['.'],
+      'sources': ['simdutf.cpp'],
+      'cflags': [ '-Wno-unused-function' ],
+      'conditions': [
+        [ 'OS!="win"', {
+          'cflags': [ '-mavx' ],
+          'xcode_settings': {
+            'OTHER_CFLAGS': [ '-mavx' ]
+          },
+        }, {
+          'msvs_settings': {
+            'VCCLCompilerTool': {
+              'AdditionalOptions': [
+                '/arch:AVX'
+              ],
+            },
+          },
+        }],
+      ],
+    },
+  ]
+}