Use the more pervasive /bin/sh instead.

Because there is nothing bash specific in this file there is no
reason to specify that bash be used.

Change-Id: I41cdf4bcfa883d13bb75fffc61ad982252c936bc
diff --git a/vm/dalvik b/vm/dalvik
index 0e69d4b..9895779 100644
--- a/vm/dalvik
+++ b/vm/dalvik
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 #
 # Copyright (C) 2011 The Android Open Source Project
 #