[libfuzzer] fuzzer for uregex_open from third_party/icu implemented

testing/libfuzzer/fuzzers/BUILD.gn

 # Copyright 2015 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.
 
 # Individual libfuzzer tests that didn't find their home yet.
 
 import("//build/config/features.gni")
 import("//media/media_options.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 
@@ skipping 285 matching lines @@
 
 fuzzer_test("libpng_read_fuzzer") {
   sources = [
     "libpng_read_fuzzer.cc",
   ]
   deps = [
     "//base",
     "//third_party/libpng",
   ]
 }
+
+fuzzer_test("icu_uregex_open_fuzzer") {
+  sources = [
+    "icu_uregex_open_fuzzer.cc",
+  ]
+  deps = [
+    "//third_party/icu",
+  ]
+}