Roll clang 138188:138417

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/7777003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@98583 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -37,7 +37,7 @@ vars = {
   # tools/clang/scripts/update.sh. The script reads this line here.
   # Do NOT CHANGE this if you don't know what you're doing -- see
   # http://code.google.com/p/chromium/wiki/UpdatingClang
-  "clang_revision": "138188",
+  "clang_revision": "138417",
 }
 
 deps = {