LLVM ICE using maud and iron

[reem]

Reproduction: https://gist.github.com/anonymous/ecaa67ead6b561fb8d39

The full error from cargo build:

   Compiling iron-maud v0.1.0 (file:///Users/reem/code/iron/iron-maud)
Global is external, but doesn't have external or weak linkage!
i8 (%closure.66*, i8*, void (i8*)**)* @_ZN4main13closure.10657E
invalid linkage type for function declaration
i8 (%closure.66*, i8*, void (i8*)**)* @_ZN4main13closure.10657E
LLVM ERROR: Broken module found, compilation aborted!
Could not compile `iron-maud`.

To learn more, run the command again with --verbose.

[Aatch]

I have a fix for this, should be up soon.