add flatbuffers

commit 6da1cf79d90eb242e7da5318241d42279a3df3ba
Author: Max Burke <max@urbanlogiq.com>
Date:   Sun Jan 19 14:47:28 2020 -0800

    [rust] Add use declarations to Rust-generated bindings for imported FB definitions (#5645)

    * Bugfix for Rust generation of union fields named with language keywords

flatbuffers/tests/namespace_test/NamespaceA/NamespaceB/EnumInNestedNS.go

@@ -0,0 +1,32 @@
+// Code generated by the FlatBuffers compiler. DO NOT EDIT.
+
+package NamespaceB
+
+import "strconv"
+
+type EnumInNestedNS int8
+
+const (
+	EnumInNestedNSA EnumInNestedNS = 0
+	EnumInNestedNSB EnumInNestedNS = 1
+	EnumInNestedNSC EnumInNestedNS = 2
+)
+
+var EnumNamesEnumInNestedNS = map[EnumInNestedNS]string{
+	EnumInNestedNSA: "A",
+	EnumInNestedNSB: "B",
+	EnumInNestedNSC: "C",
+}
+
+var EnumValuesEnumInNestedNS = map[string]EnumInNestedNS{
+	"A": EnumInNestedNSA,
+	"B": EnumInNestedNSB,
+	"C": EnumInNestedNSC,
+}
+
+func (v EnumInNestedNS) String() string {
+	if s, ok := EnumNamesEnumInNestedNS[v]; ok {
+		return s
+	}
+	return "EnumInNestedNS(" + strconv.FormatInt(int64(v), 10) + ")"
+}