[PATCH] include: Add corecrt_wstring.h header.

[Jacek Caban]

Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
---
  include/msvcrt/corecrt_wstring.h | 86 ++++++++++++++++++++++++++++++++
  include/msvcrt/string.h          | 73 +--------------------------
  include/msvcrt/wchar.h           | 59 +---------------------
  3 files changed, 88 insertions(+), 130 deletions(-)
  create mode 100644 include/msvcrt/corecrt_wstring.h