patch 8.2.0047: cannot skip tests for specific MS-Windows platform

Problem:    Cannot skip tests for specific MS-Windows platform.
Solution:   Add windowsversion().
diff --git a/src/testdir/test_options.vim b/src/testdir/test_options.vim
index 65600ee..048356a 100644
--- a/src/testdir/test_options.vim
+++ b/src/testdir/test_options.vim
@@ -389,6 +389,15 @@
   endif
 endfunc
 
+func Test_renderoptions()
+  " Only do this for Windows Vista and later, fails on Windows XP and earlier.
+  " Doesn't hurt to do this on a non-Windows system.
+  if windowsversion() !~ '^[345]\.'
+    set renderoptions=type:directx
+    set rop=type:directx
+  endif
+endfunc
+
 func ResetIndentexpr()
   set indentexpr=
 endfunc