tests: bash is not necessary, use sh

tests/datawizard/locality.sh

@@ -1,4 +1,4 @@
-#!/bin/bash -x
+#!/bin/sh -x
 #
 # StarPU --- Runtime system for heterogeneous multicore architectures.
 #

tests/microbenchs/tasks_size_overhead_scheds.sh

@@ -1,9 +1,9 @@
-#!/bin/bash
+#!/bin/sh
 #
 # StarPU --- Runtime system for heterogeneous multicore architectures.
 #
 # Copyright (C) 2016  Université de Bordeaux
-# Copyright (C) 2016  CNRS
+# Copyright (C) 2016, 2017  CNRS
 #
 # StarPU is free software; you can redistribute it and/or modify
 # it under the terms of the GNU Lesser General Public License as published by

tests/overlap/overlap.sh

@@ -1,4 +1,4 @@
-#!/bin/bash -x
+#!/bin/sh -x
 #
 # StarPU --- Runtime system for heterogeneous multicore architectures.
 #