test/legacy: Makefile Add missing tests

These tests aren't in test_alot.vim, so they need to be added to the
Makefile or they won't be run.

src/nvim/testdir/Makefile

@@ -36,6 +36,8 @@ NEW_TESTS ?= \
 	    test_diffmode.res \
 	    test_farsi.res \
 	    test_filter_map.res \
+	    test_fold.res \
+	    test_glob2regpat.res \
 	    test_gn.res \
 	    test_hardcopy.res \
 	    test_help_tagjump.res \
@@ -47,13 +49,16 @@ NEW_TESTS ?= \
 	    test_marks.res \
 	    test_match.res \
 	    test_matchadd_conceal.res \
+	    test_matchadd_conceal_utf8.res \
 	    test_nested_function.res \
 	    test_normal.res \
 	    test_quickfix.res \
 	    test_signs.res \
 	    test_syntax.res \
+	    test_tabpage.res \
 	    test_textobjects.res \
 	    test_timers.res \
+	    test_undo.res \
 	    test_usercommands.res \
 	    test_viml.res \
 	    test_visual.res \