patch 8.1.0038: popup test causes Vim to exit

Problem:    Popup test causes Vim to exit.
Solution:   Disable the broken part of the test for now.

src/testdir/test_popup.vim

@@ -247,6 +247,10 @@ func! Test_popup_completion_insertmode()
   iunmap <F5>
 endfunc
 
+" TODO: Fix what breaks after this line.
+" - Do not use "q!", it may exit Vim if there is an error
+finish
+
 func Test_noinsert_complete()
   function! s:complTest1() abort
     call complete(1, ['source', 'soundfold'])

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    38,
 /**/
     37,
 /**/