Update Windows build for 3.6
diff --git a/PCbuild/prepare_ssl.bat b/PCbuild/prepare_ssl.bat
index c08a9f3..3153615 100644
--- a/PCbuild/prepare_ssl.bat
+++ b/PCbuild/prepare_ssl.bat
@@ -3,10 +3,10 @@
   if %1 EQU Debug (

     shift

     set HOST_PYTHON=python_d.exe

-    if not exist python35_d.dll exit 1

+    if not exist python36_d.dll exit 1

   ) ELSE (

     set HOST_PYTHON=python.exe

-    if not exist python35.dll exit 1

+    if not exist python36.dll exit 1

   )

 )

 %HOST_PYTHON% prepare_ssl.py %1