[NFC] Update to account for DiagnosticRenderer use of FullSourceLoc
D31709 [NFC] Refactor DiagnosticRenderer to use FullSourceLoc was committed
in r305684 and reverted in 305688 as clang-tidy and clang-query failed to
build. This change updates the extra tools to use the new interface.
Reviewers: christof, rnk, rsmith, rovka, alexfh
Reviewed By: alexfh
Differential Revision: https://reviews.llvm.org/D34513