[libfuzzer] Add fuzzer for FT_New_Memory_Face() from third_party/freetype2.

testing/libfuzzer/fuzzers/BUILD.gn

Index: testing/libfuzzer/fuzzers/BUILD.gn
diff --git a/testing/libfuzzer/fuzzers/BUILD.gn b/testing/libfuzzer/fuzzers/BUILD.gn
index 56a42579c2beab6f20ca1ca58bd0ad7400d4a2f1..35080b063349cefa6efa6aae728cd1cce7ca363f 100644
--- a/testing/libfuzzer/fuzzers/BUILD.gn
+++ b/testing/libfuzzer/fuzzers/BUILD.gn
@@ -323,3 +323,12 @@ fuzzer_test("libxml_xml_regexp_compile_fuzzer") {
   libfuzzer_options = "libxml_xml_regexp_compile_fuzzer.options"
   additional_configs = [ "//testing/libfuzzer:no_clusterfuzz" ]
 }
+
+fuzzer_test("third_party_ft_new_memory_face_fuzzer") {
+  sources = [
+    "ft_new_memory_face_fuzzer.cc",
+  ]
+  deps = [
+    "//third_party/freetype2",
+  ]
+}