patch 8.1.2030: tests fail when build with normal features and terminal

Problem:    Tests fail when build with normal features and terminal.
            (Dominique Pelle)
Solution:   Disable tests that won't work. (closes #4932)
diff --git a/src/testdir/test_terminal.vim b/src/testdir/test_terminal.vim
index 9025f83..810dc5f 100644
--- a/src/testdir/test_terminal.vim
+++ b/src/testdir/test_terminal.vim
@@ -1684,12 +1684,14 @@
   call feedkeys("\<C-W>w", 'tx')
   call assert_equal(termwin, win_getid())
 
-  set langmap=xjyk
-  call feedkeys("\<C-L>x", 'tx')
-  call assert_equal(thiswin, win_getid())
-  call feedkeys("\<C-W>y", 'tx')
-  call assert_equal(termwin, win_getid())
-  set langmap=
+  if has('langmap')
+    set langmap=xjyk
+    call feedkeys("\<C-L>x", 'tx')
+    call assert_equal(thiswin, win_getid())
+    call feedkeys("\<C-W>y", 'tx')
+    call assert_equal(termwin, win_getid())
+    set langmap=
+  endif
 
   call feedkeys("\<C-L>gt", "xt")
   call assert_equal(3, tabpagenr())