[libfuzzer] unittest-style main driver.

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")
 
+# root BUILD depenends on this target. Needed for package discovery
+group("fuzzers") {
+}
+
 fuzzer_test("empty_fuzzer") {
   sources = [
     "empty_fuzzer.cc",
   ]
   additional_configs = [ "//testing/libfuzzer:no_clusterfuzz" ]
 }
 
 fuzzer_test("brotli_fuzzer") {
   sources = [
     "brotli_fuzzer.cc",
@@ skipping 258 matching lines @@
 }
 
 fuzzer_test("libexif_parser_fuzzer") {
   sources = [
     "libexif_parser_fuzzer.cc",
   ]
   deps = [
     "//third_party/libexif:libexif_fuzzers",
   ]
 }