Remove misleading comment about using cc1 option table.

There hasn't been a separate cc1 option table since r155916.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@187993 91177308-0d34-0410-b5e6-96231b3b80d8
Add clang_Location_isFromMainFile() to libclang.

Also bump the minor version number and update libclang.exports.

Reviewed by: Dmitri Gribenko, Doug Gregor

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@187994 91177308-0d34-0410-b5e6-96231b3b80d8