Switch clang-query to use the lineeditor library.

Differential Revision: http://llvm-reviews.chandlerc.com/D2262

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@200603 91177308-0d34-0410-b5e6-96231b3b80d8
Add completion to the query parser, and hook it up to clang-query.

Differential Revision: http://llvm-reviews.chandlerc.com/D2263

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@200604 91177308-0d34-0410-b5e6-96231b3b80d8