Switch clang-stable over to current Clang build

Change-Id: I71185ac9737592c1e70d26aa2aecc9761f4f9ea7
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