patch 8.2.1273: MS-Windows: terminal test may leave file behind

Problem:    MS-Windows: terminal test may leave file behind.
Solution:   Wait a moment for process to end before deleting the file.
            (Taro Muraoka, closes #6513)

src/testdir/test_terminal.vim

@@ -808,6 +808,13 @@ func Test_terminal_redir_file()
   endif
   let g:job = term_getjob(buf)
   call WaitForAssert({-> assert_equal("dead", job_status(g:job))})
+
+  if has('win32')
+    " On Windows we cannot delete a file being used by a process.  When
+    " job_status() returns "dead", the process remains for a short time.
+    " Just wait for a moment.
+    sleep 50m
+  endif
   call delete('Xfile')
   bwipe
 

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1273,
 /**/
     1272,
 /**/