Flatbuffers Merge commit '8cd6f0538a362ceefbcfcbf6c7b8b3f341d1fb41' into master

Upgrade flatbuffers to the latest.

Change-Id: I901787ac6fc5d7ce2c4019cc0d275de68086b4d8
diff --git a/third_party/flatbuffers/js/encoding.js b/third_party/flatbuffers/js/encoding.js
new file mode 100644
index 0000000..abe2e29
--- /dev/null
+++ b/third_party/flatbuffers/js/encoding.js
@@ -0,0 +1,8 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.Encoding = void 0;
+var Encoding;
+(function (Encoding) {
+    Encoding[Encoding["UTF8_BYTES"] = 1] = "UTF8_BYTES";
+    Encoding[Encoding["UTF16_STRING"] = 2] = "UTF16_STRING";
+})(Encoding = exports.Encoding || (exports.Encoding = {}));