install wangle in a temp dir
install wangle in a temp dir

Summary:
jenkins build appears to fail because the install dir is /usr/local

Also it looks like it is caching the folly install dir for some reason

https://ci-builds.fb.com/job/wangle/868/console
https://ci-builds.fb.com/job/wangle/867/console

Reviewed By: yfeldblum

Differential Revision: D2731412

fb-gh-sync-id: 9cf6e2073ad4f8deedfe8a4f429815983a828e8d

jamperry/wangle,Dalzhim/wangle,facebook/wangle,facebook/wangle,Dalzhim/wangle,facebook/wangle,jamperry/wangle