replaced #!/bin/bash with #!/usr/bin/env bash (#551)

auto-cpufreq-installer

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # auto-cpufreq-installer:
 # auto-cpufreq source code based installer

scripts/auto-cpufreq-install.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # auto-cpufreq daemon install script
 # reference: https://github.com/AdnanHodzic/auto-cpufreq

scripts/snapdaemon.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # workaround for running Daemon without polluting syslog (#53, #82)
 $SNAP/bin/auto-cpufreq --daemon 2>&1 >> $SNAP_DATA/auto-cpufreq.stats