Build with LLVM 3.6 broken on HEAD

brson July 21, 2015, 5:50pm 3

@alexcrichton has the fix.

Topic		Replies	Views	Activity
Rust vs. LLVM	18	6616	November 17, 2018
Building with system LLVM internals	4	5049	June 3, 2015
What is the principle of updating rust-lang/llvm? compiler	5	2023	February 3, 2016
Targeted LLVM for 1.0 libs	21	4362	January 30, 2015
Error in Building Rust with custom llvm-5.0 compiler	1	1152	November 23, 2018