Added symlink test for /bin, lib, and /lib64 when preparing test root filesystem.
Added symlink test for /bin, lib, and /lib64 when preparing test root
filesystem.

Review: https://reviews.apache.org/r/37684

chhsia0/mesos,andschwa/mesos,asamerh4/mesos,abudnik/mesos,dforsyth/mesos,dforsyth/mesos,verizonlabs/mesos,kaysoky/mesos,yuquanshan/customizedMesos,craimbert/mesos,verizonlabs/mesos,gsantovena/mesos,Aman-Jain-14/customizedMesos,dforsyth/mesos,Gilbert88/mesos,yuquanshan/customizedMesos,abudnik/mesos,asamerh4/mesos,chhsia0/mesos,Gilbert88/mesos,neilconway/mesos,gsantovena/mesos,dforsyth/mesos,neilconway/mesos,yuquanshan/customizedMesos,chhsia0/mesos,chhsia0/mesos,Gilbert88/mesos,Aman-Jain-14/customizedMesos,craimbert/mesos,kaysoky/mesos,verizonlabs/mesos,andschwa/mesos,neilconway/mesos,dforsyth/mesos,asamerh4/mesos,yuquanshan/customizedMesos,kaysoky/mesos,abudnik/mesos,Aman-Jain-14/customizedMesos,craimbert/mesos,dforsyth/mesos,reneploetz/mesos,jpeach/mesos,verizonlabs/mesos,craimbert/mesos,reneploetz/mesos,chhsia0/mesos,asamerh4/mesos,kaysoky/mesos,verizonlabs/mesos,yuquanshan/customizedMesos,jpeach/mesos,kaysoky/mesos,andschwa/mesos,kaysoky/mesos,andschwa/mesos,andschwa/mesos,zmalik/mesos,kaysoky/mesos,asamerh4/mesos,yuquanshan/customizedMesos,jpeach/mesos,yuquanshan/customizedMesos,andschwa/mesos,dforsyth/mesos,asamerh4/mesos,reneploetz/mesos,zmalik/mesos,abudnik/mesos,gsantovena/mesos,Aman-Jain-14/customizedMesos,jpeach/mesos,gsantovena/mesos,reneploetz/mesos,zmalik/mesos,Aman-Jain-14/customizedMesos,abudnik/mesos,craimbert/mesos,reneploetz/mesos,verizonlabs/mesos,jpeach/mesos,asamerh4/mesos,jpeach/mesos,Gilbert88/mesos,craimbert/mesos,gsantovena/mesos,jpeach/mesos,reneploetz/mesos,craimbert/mesos,reneploetz/mesos,zmalik/mesos,chhsia0/mesos,abudnik/mesos,gsantovena/mesos,Aman-Jain-14/customizedMesos,zmalik/mesos,gsantovena/mesos,verizonlabs/mesos,neilconway/mesos,Gilbert88/mesos,neilconway/mesos,zmalik/mesos,andschwa/mesos,neilconway/mesos,Aman-Jain-14/customizedMesos,neilconway/mesos,chhsia0/mesos,abudnik/mesos,Gilbert88/mesos,zmalik/mesos,Gilbert88/mesos