patch 8.0.0809: MS-Windows: tests hang

Problem:    MS-Windows: tests hang.
Solution:   Delete the XfakeHOME directory.
diff --git a/src/testdir/Make_ming.mak b/src/testdir/Make_ming.mak
index 31dfe70..3d7cf3f 100644
--- a/src/testdir/Make_ming.mak
+++ b/src/testdir/Make_ming.mak
@@ -84,6 +84,7 @@
 	-@if exist lua.vim $(DEL) lua.vim
 	-@if exist Xdir1 $(DELDIR) Xdir1
 	-@if exist Xfind $(DELDIR) Xfind
+	-@if exist XfakeHOME $(DELDIR) XfakeHOME
 	-@if exist X* $(DEL) X*
 	-@if exist viminfo $(DEL) viminfo
 	-@if exist test.log $(DEL) test.log
@@ -98,6 +99,7 @@
 	@$(MV) test.out $*.out
 	-@if exist Xdir1 $(DELDIR) Xdir1
 	-@if exist Xfind $(DELDIR) Xfind
+	-@if exist XfakeHOME $(DELDIR) XfakeHOME
 	-@if exist X* $(DEL) X*
 	-@if exist test.ok $(DEL) test.ok
 	-@if exist viminfo $(DEL) viminfo