Switch to clang-4579689.

Bug: 68397894
Test: http://go/clang-4523590-testing
Change-Id: Id3fbac182869e92ab9b7d27d63d9f28c565c7b08
diff --git a/core/clang/versions.mk b/core/clang/versions.mk
index f3a206a..1e41f92 100644
--- a/core/clang/versions.mk
+++ b/core/clang/versions.mk
@@ -1,4 +1,4 @@
 ## Clang/LLVM release versions.
 
-LLVM_PREBUILTS_VERSION ?= clang-4393122
+LLVM_PREBUILTS_VERSION ?= clang-4579689
 LLVM_PREBUILTS_BASE ?= prebuilts/clang/host