patch 8.1.2260: terminal test may fail on MS-Windows

Problem:    Terminal test may fail on MS-Windows.
Solution:   Catch the situation that "term dir" fails with a CreateProcess
            error.

src/testdir/test_terminal.vim

@@ -2226,8 +2226,12 @@ func Test_terminal_shell_option()
     bwipe!
   elseif has('win32')
     " dir is a shell builtin command, should fail without a shell.
+    try
       term dir /b runtest.vim
       call WaitForAssert({-> assert_match('job failed\|cannot access .*: No such file or directory', term_getline(bufnr(), 1))})
+    catch /CreateProcess/
+      " ignore
+    endtry
     bwipe!
 
     term ++shell dir /b runtest.vim

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2260,
 /**/
     2259,
 /**/