move Futures from folly::wangle to folly
Summary: Namespace change. Next up is to extract the Executors into folly/executors/
Test Plan: wait for contbuild
Reviewed By: davejwatson@fb.com
Subscribers: jsedgwick, trunkagent, fbcode-common-diffs@, chaoyc, search-fbcode-diffs@, lars, davejwatson, ruibalp, hero-diffs@, zeus-diffs@, andrewcox, vikas, mcduff, cold-storage-diffs@, unicorn-diffs@, ldbrandy, targeting-diff-backend@, netego-diffs@, abirchall, fugalh, adamsyta, atlas2-eng@, chenzhimin, mpawlowski, alandau, bmatheny, adityab, everstore-dev@, zhuohuang, mwa, jgehring, prometheus-diffs@, smarlow, akr, bnitka, jcoens, benj, laser-diffs@, zhguo, jying, darshan, micha, apodsiadlo, alikhtarov, fuegen, dzhulgakov, jeremyfein, mshneer, folly-diffs@, wch, lins, tingy, hannesr, maxwellsayles
FB internal diff:
D1772779
Tasks:
5960242
Signature: t1:
1772779:
1420751149:
bc0b9220be25f1d46d9cef3fdeaa9c3681217aff