Update LLVM to fix incorrect codegen on MSP430.

pftbest · pftbest · commit ec5588b4bc4e · 2017-04-27T08:40:27.000+03:00
The bug was reported by @akovaski here: rust-embedded/wg#20 (comment)
diff --git a/src/llvm b/src/llvm
@@ -1 +1 @@
-Subproject commit 878af191434cd716eeb13c2be7a2b1e21abf2749
+Subproject commit 15745af7683844e43bdec966072b8e7b44772450
diff --git a/src/rustllvm/llvm-rebuild-trigger b/src/rustllvm/llvm-rebuild-trigger
@@ -1,4 +1,4 @@
 # If this file is modified, then llvm will be (optionally) cleaned and then rebuilt.
 # The actual contents of this file do not matter, but to trigger a change on the
 # build bots then the contents should be changed so git updates the mtime.
-2017-04-25
+2017-04-26
