Fixes missing entropy in the uuid package.
Fixes missing entropy in the uuid package.

math/crypto is seeded with 1 and thus will create predictable UUIDs. Because
amazon-instance and amazon-ebs in the same second when building both targets
the timestamp in front doesn't help either. See #552

mitchellh/packer,leroux/packer,dave2/packer,justincampbell/packer,atlassian/packer,zhuzhih2017/packer,rickard-von-essen/packer,tsmolka/packer,ephemeralsnow/packer,KohlsTechnology/packer,ChrisLundquist/packer,masbog/packer,sequenceiq/packer,rodm/packer,rk295/packer,stagrlee/packer,gbarberi/packer,KohlsTechnology/packer,hashicorp/packer,jmptrader/packer,youhong316/packer,masbog/packer,evertrue/packer,tas50/packer,jae2/packer,danschaffer/packer,kgrvamsi/packer,sobrinho/packer,rodm/packer,ober/packer,evertrue/packer,ephemeralsnow/packer,Akasurde/packer,KohlsTechnology/packer,mgk/packer,dave2/packer,pvanbuijtene/packer,avldya/packer,esemplare/packer,kpettijohn/packer,israelshirk/packer,AlphaStaxLLC/packer,ttaylor249/packer,KohlsTechnology/packer,bensojona/packer,bradparks/packer__create_vm_for_aws_docker_vagrant_etc,taliesins/packer,evertrue/packer,mafrosis/packer,jasonchaffee/packer,monkeylittleinc/packer,routelastresort/packer,rk295/packer,boumenot/packer,trumant/packer,tb3088/packer,higebu/packer,life360/packer,mayflower/packer,marklap/packer,tracyde/packer,jonathankarsh/packer,dragon788/packer,zakuro9715/packer,cyberhouse/packer,higebu/packer,DualSpark/packer,mindjiver/packer,Silver90/packer,zhuzhih2017/packer,jamesleech/packer,threatstream/packer,burnzy/packer,btd/packer,burnzy/packer,rrva/packer,dave2/packer,kgrvamsi/packer,gildas/packer-hyperv,shaunduncan/packer,btd/packer,taliesins/packer,danschaffer/packer,hazelesque/packer,stagrlee/packer,tsmolka/packer,hazelesque/packer,rnaveiras/packer,sequenceiq/packer,oliviertremblay/packer,zakuro9715/packer,jae2/packer,tsmolka/packer,timsutton/packer,sean-/packer,uber/packer,lantrix/packer,esemplare/packer,pecigonzalo/packer,grubernaut/packer,tb3088/packer,mindjiver/packer,sobrinho/packer,qur/packer,tomwilkie/packer,dantran/packer,pvandervelde/packer,blairham/packer,mansunkuo/packer,marc-ta/packer,dayglojesus/packer,zhuzhih2017/packer,legal90/packer,taliesins/packer,tas50/packer,aneeshusa/packer,avldya/packer,Xiol/packer,c22/packer,uber/packer,henrysher/packer,jamesleech/packer,mkuzmin/packer,youhong316/packer,pvanbuijtene/packer,rickard-von-essen/packer,threatstream/packer,dantran/packer,higebu/packer,pearkes/packer,Silver90/packer,yoctocloud/packer,jgkim/packer,fnoeding/packer,bradparks/packer__create_vm_for_aws_docker_vagrant_etc,monkeylittleinc/packer,henrysher/packer,paulvollmer/packer,Xiol/packer,jonathankarsh/packer,sean-/packer,threatstream/packer,leroux/packer,dave2/packer,grubernaut/packer,pecigonzalo/packer,paulvollmer/packer,cyberhouse/packer,jsternberg/packer,kgrvamsi/packer,jsternberg/packer,sgirones/packer,DualSpark/packer,samdunne/packer,dragon788/packer,legal90/packer,ChrisLundquist/packer,jamesbishopp/packer,masbog/packer,manicai/packer,ChrisLundquist/packer,pecigonzalo/packer,paulvollmer/packer,jgkim/packer,atlassian/packer,jsoriano/packer,life360/packer,c22/packer,blairham/packer,rickard-von-essen/packer,marklap/packer,dave2/packer,BayanGroup/packer,leroux/packer,jen20/packer,yonglehou/packer,eranchetz/packer,rnaveiras/packer,hashicorp/packer,gbarberi/packer,c22/packer,BayanGroup/packer,yonglehou/packer,Akasurde/packer,yonglehou/packer,umang1912/packer,dieu/packer,mkuzmin/packer,smaato/packer,jgkim/packer,feateds/packer,zhuzhih2017/packer,marklap/packer,timsutton/packer,rnaveiras/packer,bensojona/packer,sneal/packer,rickard-von-essen/packer,jszwedko/packer,bradparks/packer__create_vm_for_aws_docker_vagrant_etc,sean-/packer,AlphaStaxLLC/packer,sansb/packer,cyberhouse/packer,mvanholsteijn/packer,threatstream/packer,visioncritical/packer,esemplare/packer,mansunkuo/packer,monsterzz/packer,hashicorp/packer,bryson/packer,c22/packer,ttaylor249/packer,masbog/packer,arizvisa/packer,paulmey/packer,fnoeding/packer,dev-head/packer,jamesleech/packer,umang1912/packer,sansb/packer,jgkim/packer,justincampbell/packer,dev-head/packer,yonglehou/packer,monkeylittleinc/packer,dave2/packer,feateds/packer,ChrisLundquist/packer,aneeshusa/packer,mwhooker/packer,ldejager/packer,evertrue/packer,trumant/packer,ricardclau/packer,mindjiver/packer,kgrvamsi/packer,paulmey/packer,ricardclau/packer,boumenot/packer,Cbeck527/packer,routelastresort/packer,zeliff/packer,samdunne/packer,mohae/packer,icnocop/packer,ChrisLundquist/packer,ephemeralsnow/packer,orivej/packer,paulmey/packer,Cbeck527/packer,mohae/packer,legal90/packer,mohae/packer,fnoeding/packer,boumenot/packer,rrva/packer,icnocop/packer,justincampbell/packer,sneal/packer,c22/packer,rk295/packer,ldejager/packer,arizvisa/packer,atlassian/packer,smaato/packer,napramirez/packer,btd/packer,threatstream/packer,vtolstov/packer,jimmythedog/packer,paulmey/packer,mvanholsteijn/packer,bhcleek/packer,mohae/packer,hazelesque/packer,taliesins/packer,dayglojesus/packer,mgk/packer,gildas/packer-hyperv,mwhooker/packer,Akasurde/packer,KFishner/packer,orivej/packer,dayglojesus/packer,bhcleek/packer,Banno/packer,ChrisLundquist/packer,monsterzz/packer,tb3088/packer,lantrix/packer,dantran/packer,gbarberi/packer,pieter-lazzaro/packer,p1-nico/p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