Chromium's update.sh is dead, long live update.py

update.py used to be used only on Windows until very recently, but
Windows and non-Windows have been at the same clang revision for
a while now.  So even a few months ago update.py and update.sh
would've contained the same clang revision.

BUG=chromium:494442

Change-Id: Ie9127a1c49e31a7810ee431f8e662350c245917c
Reviewed-on: https://boringssl-review.googlesource.com/6620
Reviewed-by: David Benjamin <davidben@chromium.org>
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/util/bot/update_clang.py b/util/bot/update_clang.py
index 0836d11..1824393 100644
--- a/util/bot/update_clang.py
+++ b/util/bot/update_clang.py
@@ -20,7 +20,7 @@
 import urllib
 
 # CLANG_REVISION and CLANG_SUB_REVISION determine the build of clang
-# to use. These should be synced with tools/clang/scripts/update.sh in
+# to use. These should be synced with tools/clang/scripts/update.py in
 # Chromium.
 CLANG_REVISION = "233105"
 CLANG_SUB_REVISION = "1"