patch 8.1.1268: map completion test fails in GUI

Problem:    Map completion test fails in GUI.
Solution:   Skip the test that fails.

src/testdir/test_cmdline.vim

@@ -111,8 +111,10 @@ func Test_map_completion()
   call feedkeys(":map \<Esc>[17~x f6x\<CR>", 'xt')
   call feedkeys(":map <L\<Tab>\<Home>\"\<CR>", 'xt')
   call assert_equal('"map <Left>', getreg(':'))
-  call feedkeys(":map \<Esc>[17~\<Tab>\<Home>\"\<CR>", 'xt')
-  call assert_equal("\"map <F6>x", getreg(':'))
+  if !has('gui_running')
+    call feedkeys(":map \<Esc>[17~\<Tab>\<Home>\"\<CR>", 'xt')
+    call assert_equal("\"map <F6>x", getreg(':'))
+  endif
   unmap <Left>
   call feedkeys(":unmap \<Esc>[17~x\<CR>", 'xt')
   set cpo-=<

src/version.c

@@ -767,6 +767,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1268,
 /**/
     1267,
 /**/