[PATCH 01/18] ntdll: Store entire XMM context in x86_64 syscall thunk.

[Jacek Caban]

Signed-off-by: Jacek Caban 
---
With this patch series, MSVC remote debugger is able to successfully 
break and continue a thread that is currently executing syscall in 
Windows sense (and being inside NtWait* syscall is the most common state 
of in a typical application threads).

The series ended up long, mostly because I split it aggressively, but 
sending only part of it would not give full context for the review.

dlls/ntdll/unix/signal_x86_64.c | 58 ++++++++++++++-------------------
  tools/winebuild/import.c        | 18 +++-------
  2 files changed, 30 insertions(+), 46 deletions(-)