patch 8.2.3737: test fails without the 'autochdir' option

Problem:    Test fails without the 'autochdir' option.
Solution:   Check that the option is available. (Dominique Pellé, closes #9272)

src/testdir/test_cd.vim

@@ -226,6 +226,8 @@ func Test_cd_unknown_dir()
 endfunc
 
 func Test_getcwd_actual_dir()
+  CheckOption autochdir
+
   let startdir = getcwd()
   call mkdir('Xactual')
   call test_autochdir()

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3737,
 /**/
     3736,
 /**/