Updated shebang in shell scripts

Following grame-cncm/faust#1048, this commit updates two scripts.
No bashisms this time but we don't use sh explicitely anymore in ./scripts/buildtools
to run faust2x tools as they are meant to be used with bash as indicated by their shebang.

scripts/buildtools

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 
 #cd $1
@@ -9,7 +9,7 @@ do
 	echo
 	echo "## " $tool
 	echo "<pre class=faust-tools>"
-	sh $tool -help | sed -e 's/\</\&lt;/g'
+	$tool -help | sed -e 's/\</\&lt;/g'
 	echo "</pre>"
 	echo
 

scripts/make-example

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