Homebrew/homebrew — pull request #30956 by alexchandel (2014-07-23 08:07:34+00:00)
Title: add lld option to llvm

According to lld's [build guide](http://lld.llvm.org/getting_started.html#building-lld), lld can be built with llvm.

It should probably be enabled with the flag `--with-lld`, just like `--with-clang`.