gallivm: Fix build since llvm-3.7.0svn r234495

Revert 50e9fa2ed69cb5f76f66231976ea789c0091a64d as LLVM reverted their
change.

Signed-off-by: Nick Sarnie <commendsarnex@gmail.com>
Reviewed-by: Jan Vesely <jan.vesely@rutgers.edu>
1 file changed