Fix std::wstring allocator tests
* testsuite/21_strings/basic_string/allocator/wchar_t/copy.cc:
Remove reundant check for _GLIBCXX_USE_WCHAR_T and fix char type.
* testsuite/21_strings/basic_string/allocator/wchar_t/copy_assign.cc:
Likewise.
* testsuite/21_strings/basic_string/allocator/wchar_t/minimal.cc:
Likewise.
* testsuite/21_strings/basic_string/allocator/wchar_t/move.cc:
Likewise.
* testsuite/21_strings/basic_string/allocator/wchar_t/move_assign.cc:
Likewise.
* testsuite/21_strings/basic_string/allocator/wchar_t/noexcept.cc:
Likewise.
* testsuite/21_strings/basic_string/allocator/wchar_t/swap.cc:
Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@238996 138bc75d-0d04-0410-961f-82ee72b054a4