patch 8.1.0029: terminal test fails on MS-Windows when "wc" exists

Problem:    Terminal test fails on MS-Windows when "wc" exists.
Solution:   Skip test with redirection on MS-Windows.

src/testdir/test_terminal.vim

@@ -580,6 +580,10 @@ func Test_terminal_write_stdin()
   if !executable('wc')
     throw 'skipped: wc command not available'
   endif
+  if has('win32')
+    " TODO: enable once writing to stdin works on MS-Windows
+    return
+  endif
   new
   call setline(1, ['one', 'two', 'three'])
   %term wc

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    29,
 /**/
     28,
 /**/