Update clang-format binaries and scripts for all platforms (take 2).

DEPS

Index: DEPS
diff --git a/DEPS b/DEPS
index ca48a906b09f6894c2a1fbe236c3bc46a56581f8..112bd11fbca1108025acee09e8bd244c2d37adb7 100644
--- a/DEPS
+++ b/DEPS
@@ -3,7 +3,7 @@ use_relative_paths = True
 vars = {
   "chromium_url": "https://chromium.googlesource.com",
 
-  "clang_format_rev": "6a413e91d56d6fd0a6ff2f97c905c6dc5ca5d789", # r284988
+  "clang_format_rev": "4be7a6c06697b4300179feccfb49be43a0f8d3df", # r289428

[Dan Beam, 2017/01/27 02:30:06]

note: I think this is correct, but r289428 is the git-svn-id of
4be7a6c06697b4300179feccfb49be43a0f8d3df here:

https://chromium.googlesource.com/chromium/llvm-project/cfe/tools/clang-forma...

whereas the binary was built at a different rev (which it says when you pass
--version)

[Nico, 2017/01/27 02:35:27]

I'd still say "#r290930" here (the scripts didn't change between 289428 and
290930 so it's the same, and imho it's better for this to match the other rev #,
but up to you)

[Dan Beam, 2017/01/27 02:39:46]

the previous rev is the SHA1 and corresponding git-svn-id, that's why I did this
as well

   "libcxx_revision": "b1ece9c037d879843b0b0f5a2802e1e9d443b75a",    # r256621
   "libcxxabi_revision": "0edb61e2e581758fc4cd4cd09fc588b3fc91a653", # r256323
 }