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/TableInNestedNS.lua

@@ -0,0 +1,35 @@
+-- automatically generated by the FlatBuffers compiler, do not modify
+
+-- namespace: NamespaceB
+
+local flatbuffers = require('flatbuffers')
+
+local TableInNestedNS = {} -- the module
+local TableInNestedNS_mt = {} -- the class metatable
+
+function TableInNestedNS.New()
+    local o = {}
+    setmetatable(o, {__index = TableInNestedNS_mt})
+    return o
+end
+function TableInNestedNS.GetRootAsTableInNestedNS(buf, offset)
+    local n = flatbuffers.N.UOffsetT:Unpack(buf, offset)
+    local o = TableInNestedNS.New()
+    o:Init(buf, n + offset)
+    return o
+end
+function TableInNestedNS_mt:Init(buf, pos)
+    self.view = flatbuffers.view.New(buf, pos)
+end
+function TableInNestedNS_mt:Foo()
+    local o = self.view:Offset(4)
+    if o ~= 0 then
+        return self.view:Get(flatbuffers.N.Int32, o + self.view.pos)
+    end
+    return 0
+end
+function TableInNestedNS.Start(builder) builder:StartObject(1) end
+function TableInNestedNS.AddFoo(builder, foo) builder:PrependInt32Slot(0, foo, 0) end
+function TableInNestedNS.End(builder) return builder:EndObject() end
+
+return TableInNestedNS -- return the module