llvm: Add build with lld for #30956

Closes #30956.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
ansible: Update to 1.6.8
ansible: update 1.6.8 bottle.

Closes #31062.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
sphinx 2.1.9
sphinx: update 2.1.9 bottle.

Closes #31060.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
heroku-toolbelt 3.9.6

Closes #31067.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
Merge branch 'master' of http://github.com/mxcl/homebrew