patch 8.0.0805: GUI test fails with gnome2

Problem:    GUI test fails with gnome2.
Solution:   Set $HOME to an existing directory.

src/testdir/runtest.vim

@@ -158,6 +158,9 @@ func FinishTesting()
   " Don't write viminfo on exit.
   set viminfo=
 
+  " Clean up files created by setup.vim
+  call delete('XfakeHOME', 'rf')
+
   if s:fail == 0
     " Success, create the .res file so that make knows it's done.
     exe 'split ' . fnamemodify(g:testname, ':r') . '.res'

src/testdir/setup.vim

@@ -14,5 +14,7 @@ if 1
   endif
 
   " Make sure $HOME does not get read or written.
-  let $HOME = '/does/not/exist'
+  " It must exist, gnome tries to create $HOME/.gnome2
+  let $HOME = getcwd() . '/XfakeHOME'
+  call mkdir($HOME)
 endif

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    805,
 /**/
     804,
 /**/