[libclang] Introduce clang_getFileLocation.

Uses of clang_getSpellingLocation should eventually move to calling
clang_getFileLocation, and clang_getSpellingLocation should do what
its name represents and actually point at the 'spelling' location, e.g.
inside a macro definition if the spelling of a token came from that.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171486 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed