Upgrade LLVM for segmented stacks on thumb

alexcrichton · alexcrichton · commit fda671683ec2 · 2014-02-19T14:58:02.000-08:00
This updates the LLVM submodule to the `rust-llvm-2014-02-19` tag which is the old one with rust-lang/llvm#4 cherry-picked on top. Awesome job by @neykov for this!
diff --git a/src/llvm b/src/llvm
@@ -1 +1 @@
-Subproject commit f5f1ffea207b6b380127ff34f14015ae005d1413
+Subproject commit b015ecddd3129490fa26e5278a1acee79f2ee5ef
