[PATCH] [libcxx] Add <experimental/tuple>

[Eric Fiselier]

1. Address @mclow.lists comments about `_LIBCPP_HAS_NO_VARIABLE_TEMPLATES`.
2. Move some tests from `test/libcxx` to `test/std` because they no longer test extensions.
3. Remove test for feature macro.


http://reviews.llvm.org/D7354

Files:
  include/__functional_base
  include/experimental/tuple
  include/type_traits
  test/libcxx/experimental/utilities/tuple/header.tuple.synop/includes.pass.cpp
  test/libcxx/experimental/utilities/tuple/version.pass.cpp
  test/std/experimental/utilities/tuple/header.tuple.synop/includes.pass.cpp
  test/std/experimental/utilities/tuple/tuple.apply/arg_type.pass.cpp
  test/std/experimental/utilities/tuple/tuple.apply/constexpr_types.pass.cpp
  test/std/experimental/utilities/tuple/tuple.apply/extended_types.pass.cpp
  test/std/experimental/utilities/tuple/tuple.apply/large_arity.pass.cpp
  test/std/experimental/utilities/tuple/tuple.apply/ref_qualifiers.pass.cpp
  test/std/experimental/utilities/tuple/tuple.apply/return_type.pass.cpp
  test/std/experimental/utilities/tuple/tuple.apply/types.pass.cpp
  test/std/experimental/utilities/tuple/tuple_size_v.fail.cpp
  test/std/experimental/utilities/tuple/tuple_size_v.pass.cpp
  test/std/experimental/utilities/tuple/tuple_size_v_2.fail.cpp
  test/std/experimental/utilities/tuple/tuple_size_v_3.fail.cpp
  www/ts1z_status.html

EMAIL PREFERENCES
  http://reviews.llvm.org/settings/panel/emailpreferences/
-------------- next part --------------
A non-text attachment was scrubbed...
Name: D7354.22097.patch
Type: text/x-patch
Size: 49727 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20150317/d7f82876/attachment.bin>