[Patch] [libstdc++] [C++0x] Export std::string base object move constructor.

[Paolo Carlini]

Hi,
> The testcases are copies of corresponding moveable.cc tests, just
> using the new class inheriting from std::basic_string<char>  resp.
> std::basic_string<wchar_t>  and with -fno-inline.
> Is that ok?
Minor nit: no 2010 among the Copyright years.

Paolo.