update facebook-clang-plugins
update facebook-clang-plugins

Summary:
contains fix for ambiguous template lookups

update-submodule: facebook-clang-plugins

Reviewed By: dulmarod

Differential Revision: D18906400

fbshipit-source-id: ce8b30745

jvillard/infer,jvillard/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer,facebook/infer,facebook/infer,jvillard/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer,facebook/infer