Correctly mark first token in the presence of UTF-8 BOM.

Summary: Fixes http://llvm.org/PR17753

Reviewers: klimek

Reviewed By: klimek

CC: cfe-commits, klimek

Differential Revision: http://llvm-reviews.chandlerc.com/D2159

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194576 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed