Added precondition section for Linux build on atom-shell
Added precondition section for Linux build on atom-shell

kausdev/LightTable,youprofit/LightTable,0x90sled/LightTable,BenjaminVanRyseghem/LightTable,LightTable/LightTable,fdserr/LightTable,0x90sled/LightTable,kenny-evitt/LightTable,fdserr/LightTable,masptj/LightTable,windyuuy/LightTable,craftybones/LightTable,nagyistoce/LightTable,rundis/LightTable,LightTable/LightTable,nagyistoce/LightTable,kenny-evitt/LightTable,bruno-oliveira/LightTable,pkdevbox/LightTable,mpdatx/LightTable,bruno-oliveira/LightTable,Bost/LightTable,kausdev/LightTable,ashneo76/LightTable,mpdatx/LightTable,mrwizard82d1/LightTable,kenny-evitt/LightTable,masptj/LightTable,sbauer322/LightTable,bruno-oliveira/LightTable,kolya-ay/LightTable,brabadu/LightTable,craftybones/LightTable,brabadu/LightTable,windyuuy/LightTable,kausdev/LightTable,EasonYi/LightTable,craftybones/LightTable,hiredgunhouse/LightTable,pkdevbox/LightTable,EasonYi/LightTable,BenjaminVanRyseghem/LightTable,ashneo76/LightTable,rundis/LightTable,sbauer322/LightTable,LightTable/LightTable,0x90sled/LightTable,mpdatx/LightTable,masptj/LightTable,windyuuy/LightTable,pkdevbox/LightTable,nagyistoce/LightTable,BenjaminVanRyseghem/LightTable,rundis/LightTable,sbauer322/LightTable,mrwizard82d1/LightTable,Bost/LightTable,hiredgunhouse/LightTable,brabadu/LightTable,fdserr/LightTable,ashneo76/LightTable,mrwizard82d1/LightTable,youprofit/LightTable,kolya-ay/LightTable,Bost/LightTable,EasonYi/LightTable,hiredgunhouse/LightTable,kolya-ay/LightTable,youprofit/LightTable