[patch] Add <codecvt> and last pieces of C++11 std::lib

[Jonathan Wakely]

On 20/01/15 09:02 -0800, H.J. Lu wrote:
>On Linux/ia-32, I got
>
>output is:
>/tmp/ccApSqaQ.o: In function `facet<char>::facet()':^M
>/export/gnu/import/git/gcc-test-x32/src-trunk/libstdc++-v3/testsuite/22_locale/ctype_byname/2.cc:29:
>undefined reference to
>`std::ctype_byname<char>::ctype_byname(std::__cxx11::basic_string<char,
>std::char_traits<char>, std::allocator<char> > const&, unsigned
>int)'^M
>/tmp/ccApSqaQ.o: In function `facet<wchar_t>::facet()':^M
>/export/gnu/import/git/gcc-test-x32/src-trunk/libstdc++-v3/testsuite/22_locale/ctype_byname/2.cc:29:
>undefined reference to
>`std::ctype_byname<wchar_t>::ctype_byname(std::__cxx11::basic_string<char,
>std::char_traits<char>, std::allocator<char> > const&, unsigned
>int)'^M
>collect2: error: ld returned 1 exit status^M
>
>FAIL: 22_locale/ctype_byname/2.cc (test for excess errors)
>FAIL: libstdc++-abi/abi_check

I'll take a look later today.