[misc] fix shebang, use bash, thanks to mgorny@gentoo.org

misc/entropy.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #    Entropy Bash-based trigger interpreter
 #
 #

misc/entropy_hwgen.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # Entropy Hardware hash generator
 
 [[ -x "/sbin/ifconfig" ]] || exit 1