Switch clang-stable over to current Clang build

Change-Id: Ia31f4b1e15a7dc6f8e9d7ec570539f5dd94a71d7
diff --git a/clang-stable b/clang-stable
index 2eb5889..b5f5948 120000
--- a/clang-stable
+++ b/clang-stable
@@ -1 +1 @@
-clang-3859424/
\ No newline at end of file
+clang-4053586
\ No newline at end of file