[#1084] only download one copy of libarchive :)
[#1084] only download one copy of libarchive :)

leesab/irods,janiheikkinen/irods,janiheikkinen/irods,janiheikkinen/irods,janiheikkinen/irods,PaulVanSchayck/irods,PaulVanSchayck/irods,janiheikkinen/irods,janiheikkinen/irods,janiheikkinen/irods,janiheikkinen/irods,leesab/irods,PaulVanSchayck/irods,leesab/irods,PaulVanSchayck/irods,leesab/irods,leesab/irods,leesab/irods,PaulVanSchayck/irods,PaulVanSchayck/irods,janiheikkinen/irods,PaulVanSchayck/irods,PaulVanSchayck/irods,leesab/irods,PaulVanSchayck/irods