Switch clang-stable to point to clang-3016494.

Bug: http://b/28149048
Change-Id: Iac06f337a5f39a1e45aaa28641db8313e3100387
diff --git a/clang-stable b/clang-stable
index a57f773..2fb2be8 120000
--- a/clang-stable
+++ b/clang-stable
@@ -1 +1 @@
-clang-2812033/
\ No newline at end of file
+clang-3016494/
\ No newline at end of file