Update LLVM to 1abfd0e562cc8f7a9577d97ee92246699093b954

https://github.com/rust-lang/llvm/pull/111
https://github.com/rust-lang/llvm/pull/114

diff --git a/src/llvm b/src/llvm
index fd7dd99edf371ac502ae4e70288c027f6692ace0..1abfd0e562cc8f7a9577d97ee92246699093b954 160000 (submodule)
--- a/src/llvm
+++ b/src/llvm
@@ -1 +1 @@
-Subproject commit fd7dd99edf371ac502ae4e70288c027f6692ace0
+Subproject commit 1abfd0e562cc8f7a9577d97ee92246699093b954