Added a specialization for empty tuple ( tuple<> )

Added 'typename's to make_tuple return types to avoid warnings in
edg strict mode


[SVN r10906]

libs/tuple

@@ -1 +1 @@
-Subproject commit 00688f9a4ac8ec3c5f679f9b216a9c3c3a6e840b
+Subproject commit 1469663d6042c630c467e708871edc6d21d3a442