patch 8.2.2153: popupwin test for latin1 still fails sometimes

Problem:    Popupwin test for latin1 still fails sometimes.
Solution:   Wait for the "cat" command to finish.
diff --git a/src/testdir/test_popupwin.vim b/src/testdir/test_popupwin.vim
index 32a1eb7..ca7c6a9 100644
--- a/src/testdir/test_popupwin.vim
+++ b/src/testdir/test_popupwin.vim
@@ -3722,6 +3722,10 @@
       terminal cat Xmultibyte
       call popup_create(['one', 'two', 'three', 'four'], #{line: 1, col: 10})
       redraw
+      " wait for "cat" to finish
+      while execute('ls!') !~ 'finished'
+	sleep 10m
+      endwhile
       echo "Done"
   END
   call writefile(lines, 'XtestPopupLatin')
diff --git a/src/version.c b/src/version.c
index 3e64518..2bb336e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2153,
+/**/
     2152,
 /**/
     2151,