patch 8.0.0433: beeps when running tests

Problem:    Quite a few beeps when running tests.
Solution:   Set 'belloff' for these tests. (Christian Brabandt)
diff --git a/src/testdir/test32.in b/src/testdir/test32.in
index 6b399fa..602d9e5 100644
--- a/src/testdir/test32.in
+++ b/src/testdir/test32.in
@@ -23,6 +23,7 @@
 STARTTEST
 :so small.vim
 :se nocp viminfo+=nviminfo cpt=.,w ff=unix | $-2,$w!Xtestfile | set ff&
+:set belloff=all
 :se cot=
 nO#include "Xtestfile"
 ru