Update Windows Clang version to r201604

BUG=none
NOTRY=true
TBR=rnk

Review URL: https://codereview.chromium.org/171363002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251854 0039d316-1c4b-4281-b951-d872f2087c98

tools/clang/scripts/update.py

@@ -15,7 +15,7 @@ import sys
 # https://code.google.com/p/chromium/wiki/UpdatingClang
 # Reverting problematic clang rolls is safe, though.
 # Note: this revision is only used for Windows. Other platforms use update.sh.
-LLVM_WINDOWS_REVISION = '201116'
+LLVM_WINDOWS_REVISION = '201604'
 
 # Path constants. (All of these should be absolute paths.)
 THIS_DIR = os.path.abspath(os.path.dirname(__file__))