patch 8.1.2373: cannot build with +popupwin but without +quickfix

Problem:    Cannot build with +popupwin but without +quickfix. (John Marriott)
Solution:   Adjust #ifdefs.
diff --git a/src/testdir/test_execute_func.vim b/src/testdir/test_execute_func.vim
index c2d504f..7934e60 100644
--- a/src/testdir/test_execute_func.vim
+++ b/src/testdir/test_execute_func.vim
@@ -1,6 +1,7 @@
 " test execute()
 
 source view_util.vim
+source check.vim
 
 func NestedEval()
   let nested = execute('echo "nested\nlines"')
@@ -104,6 +105,8 @@
 endfunc
 
 func Test_win_execute_update_ruler()
+  CheckFeature quickfix
+
   enew
   call setline(1, range(500))
   20