Switch to using clang-3289846.

Bug: http://b/30252254
Test: Built/boot platform using latest prebuilts.
Change-Id: I7c9357a99afec323fd766e93b5d5e941e9e06244
diff --git a/core/clang/versions.mk b/core/clang/versions.mk
index 44fdb1a..03341d9 100644
--- a/core/clang/versions.mk
+++ b/core/clang/versions.mk
@@ -1,5 +1,5 @@
 ## Clang/LLVM release versions.
 
 LLVM_RELEASE_VERSION := 3.8
-LLVM_PREBUILTS_VERSION ?= clang-3217047
+LLVM_PREBUILTS_VERSION ?= clang-3289846
 LLVM_PREBUILTS_BASE ?= prebuilts/clang/host