Run bash-specific shell scripts with bash, not sh.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@27231 b3059339-0415-0410-9bf9-f77b7e298cf2

TOOLS/checktree.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # -----------------------------------------------------------------------------
 

TOOLS/mencvcd.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # Version:          0.2.2
 #

TOOLS/mplmult.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # example how to output video on multiple windows in sync.
 # might be even more useful in combination with vo ggi
 # to distribute the video arbitrarily

TOOLS/psnr-video.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # Helper script to ease comparing the PSNR between two video files
 # Copyleft 2005 by Matthias Wieser
 # Copyleft 2005 by Ivo