[PATCH v2 15/19] ntdll: Use xsavec in syscall dispatcher on x86_64 when possible.

[Jacek Caban]

Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
---
  dlls/ntdll/unix/signal_x86_64.c |  8 ++++++++
  tools/winebuild/import.c        | 13 ++++++++++++-
  2 files changed, 20 insertions(+), 1 deletion(-)