[v3] <initializer_list> constexpr tests, <tuple> default ctors

[Benjamin Kosnik]

Adds in tuple default constexpr ctors, tests.

Adds in initializer_list tests.

Remaining are the shared/unique/weak_ptr classes, passing that off
to Jonathan...

tested x86_64/linux

-benjamin
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 20101103-4.patch
Type: text/x-patch
Size: 6182 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20101104/a83136ef/attachment.bin>