Issue #21665: Don't use 'OPTS=noxp' when compiling Tk.

That option had been for Win2k compatibility (which was dropped with
Python 3.3) and makes default ttk ugly on post-Win2k systems.
diff --git a/PCbuild/tk.vcxproj b/PCbuild/tk.vcxproj
index 3944ef7..d760f87 100644
--- a/PCbuild/tk.vcxproj
+++ b/PCbuild/tk.vcxproj
@@ -153,9 +153,9 @@
 IF "$(Platform)" EQU "x64" set TclMachine=AMD64
 
 IF "$(Configuration)" EQU "Debug" (
-    set TclOpts=symbols,noxp
+    set TclOpts=symbols
 ) ELSE (
-    set TclOpts=noxp
+    set TclOpts=
 )
 
 cd $(tkDir)\win