lxc-destroy: use posix shell instead of bash
lxc-destroy: use posix shell instead of bash

- avoid use getopt --longoptions

Signed-off-by: Natanael Copa <d6dfbe96822fc6f407d114112670f8d1571509f1@alpinelinux.org>
Acked-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

christiaan/lxc,thmo/lxc,smoser/lxc,bostjan/lxc,ojkastl/lxc_Patches,akshaykarle/lxc,rldleblanc/lxc,akshaykarle/lxc,tych0/lxc,Ponce/lxc,QingweiPeterLan/cs188-lxc,JohnPeacockMessageSystems/lxc,ysbnim/lxc,szaszg/lxc,major/lxc,abstrakraft/lxc-android-lxc,major/lxc,armcc/lxc,ojkastl/lxc_Patches,LynxChaus/lxc,bostjan/lxc,terceiro/lxc,federicobriata/lxc,yubo/lxc,smoser/lxc,tych0/lxc,hfuCN/lxc,christiaan/lxc,rldleblanc/lxc,ojkastl/lxc_Patches,QingweiPeterLan/cs188-lxc,aeris/lxc,aeris/lxc,ss1h2a3tw/lxc,sapun/lxc,fwilson42/lxc,regit/lxc,lisongmin/lxc,LynxChaus/lxc,fwilson42/lxc,regit/lxc,ioops/lxc,yubo/lxc,bmoar/lxc,yubo/lxc,Pelagicore/lxc,federicobriata/lxc,glensc/lxc,codebauss/lxc,ysbnim/lxc,Pelagicore/lxc,hkjolhede/lxc,jirislaby/lxc,ecarrara/lxc,abstrakraft/lxc-android-lxc,szaszg/lxc,ss1h2a3tw/lxc,weizhenwei/lxc,ojkastl/lxc_Patches,hallyn/lxc,ecarrara/lxc,ioops/lxc,caglar10ur/lxc,Ponce/lxc,JohnPeacockMessageSystems/lxc,tych0/lxc,hkjolhede/lxc,virajs/lxc,DarknessBeforeDawn/lxc,armcc/lxc,GreatFruitOmsk/lxc,ss1h2a3tw/lxc,sapun/lxc,hallyn/lxc,Ponce/lxc,lazy404/lxc,rowhit/lxc,cjwatson/lxc,raspberrypython/lxc,ksperis/lxc,Pelagicore/lxc,JohnPeacockMessageSystems/lxc,GreatFruitOmsk/lxc,weizhenwei/lxc,DarknessBeforeDawn/lxc,caglar10ur/lxc,ksperis/lxc,lazy404/lxc,akshaykarle/lxc,weizhenwei/lxc,thmo/lxc,abstrakraft/lxc-android-lxc,virajs/lxc,hallyn/lxc,lazy404/lxc,rowhit/lxc,szaszg/lxc,christiaan/lxc,ecarrara/lxc,regit/lxc,ioops/lxc,LynxChaus/lxc,GreatFruitOmsk/lxc,smoser/lxc,codebauss/lxc,smoser/lxc,major/lxc,cjwatson/lxc,efiop/lxc,glensc/lxc,hkjolhede/lxc,caglar10ur/lxc,QingweiPeterLan/cs188-lxc,bmoar/lxc,Distrotech/lxc,hfuCN/lxc,codebauss/lxc,ysbnim/lxc,cjwatson/lxc,Distrotech/lxc,aeris/lxc,fwilson42/lxc,virajs/lxc,jirislaby/lxc,terceiro/lxc,sapun/lxc,abstrakraft/lxc-android-lxc,lisongmin/lxc,efiop/lxc,rowhit/lxc,glensc/lxc,lisongmin/lxc,raspberrypython/lxc,DarknessBeforeDawn/lxc,Distrotech/lxc,federicobriata/lxc,armcc/lxc,jirislaby/lxc,bmoar/lxc,hfuCN/lxc,ksperis/lxc,efiop/lxc,thmo/lxc,terceiro/lxc,rldleblanc/lxc,bostjan/lxc,raspberrypython/lxc