i#1584 dash's echo doesn't have a -e switch: use bash
i#1584 dash's echo doesn't have a -e switch: use bash

This reverts commit 1e1f894572cf34bb7b3275b91086f9cb5e9fc251
and changes from /bin/sh to /bin/bash

Fixes #1584

Review-URL: https://codereview.appspot.com/197150043

sigma-random/dynamorio,code4bones/dynamorio,daksunt/dynamorio,AmesianX/dynamorio,daksunt/dynamorio,bl4ckic3/dynamorio,AmesianX/dynamorio,code4bones/dynamorio,AmesianX/dynamorio,bl4ckic3/dynamorio,sigma-random/dynamorio,sigma-random/dynamorio,code4bones/dynamorio,daksunt/dynamorio,bl4ckic3/dynamorio,bl4ckic3/dynamorio,AmesianX/dynamorio,daksunt/dynamorio,code4bones/dynamorio,daksunt/dynamorio,AmesianX/dynamorio,sigma-random/dynamorio,bl4ckic3/dynamorio,code4bones/dynamorio,sigma-random/dynamorio