Update prebuilt Clang to match Android kernel.

Bug: 132428451
Change-Id: I8f6e2cb23f381fc0c02ddea99b867e58e925e5be
diff --git a/linux-x64/clang/share/opt-viewer/opt-stats.py b/linux-x64/clang/share/opt-viewer/opt-stats.py
index 03de23b..f4ee3a7 100755
--- a/linux-x64/clang/share/opt-viewer/opt-stats.py
+++ b/linux-x64/clang/share/opt-viewer/opt-stats.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.7
+#!/usr/bin/env python
 
 from __future__ import print_function