Fix pre-Vista Windows build: 64 bit Interlocked* functions may not be available.
Fix pre-Vista Windows build: 64 bit Interlocked* functions may not
be available.

* subversion/libsvn_subr/svn_named_atomic.c
  (sync*): use interlocked functions on XP64 and later or when available
   as intrinsics

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1326315 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion