roll clang 151385:152598

New stuff:
* ObjC number, array, dict literals
* ASan fixes, visibility fixes (see bugs)
* (c++11: User-defined literals)
* -Wstring-plus-int

BUG=114996,112539
TEST=none

Review URL: http://codereview.chromium.org/9703027

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@126898 0039d316-1c4b-4281-b951-d872f2087c98

tools/clang/scripts/update.sh

@@ -8,7 +8,7 @@
 # Do NOT CHANGE this if you don't know what you're doing -- see
 # https://code.google.com/p/chromium/wiki/UpdatingClang
 # Reverting problematic clang rolls is safe, though.
-CLANG_REVISION=151385
+CLANG_REVISION=152598
 
 THIS_DIR="$(dirname "${0}")"
 LLVM_DIR="${THIS_DIR}/../../../third_party/llvm"