Roll clang on Windows to r201612 for vdtor fix

TBR=hans@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/171643002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251940 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251940