Flatbuffers Merge commit '8cd6f0538a362ceefbcfcbf6c7b8b3f341d1fb41' into master

Upgrade flatbuffers to the latest.

Change-Id: I901787ac6fc5d7ce2c4019cc0d275de68086b4d8
diff --git a/third_party/flatbuffers/js/flexbuffers/flexbuffers-util.js b/third_party/flatbuffers/js/flexbuffers/flexbuffers-util.js
new file mode 100644
index 0000000..0d4e166
--- /dev/null
+++ b/third_party/flatbuffers/js/flexbuffers/flexbuffers-util.js
@@ -0,0 +1,13 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.toUTF8Array = exports.fromUTF8Array = void 0;
+function fromUTF8Array(data) {
+    var decoder = new TextDecoder();
+    return decoder.decode(data);
+}
+exports.fromUTF8Array = fromUTF8Array;
+function toUTF8Array(str) {
+    var encoder = new TextEncoder();
+    return encoder.encode(str);
+}
+exports.toUTF8Array = toUTF8Array;