Solves issue https://reviews.llvm.org/D86131#2247275 Reviewed By: hans Differential Revision: https://reviews.llvm.org/D86875
Summary: Other LLVM sub-projects use docs/ folder for documentation files. Follow LLVM project policy. Modify `documentation/` references in sources to `docs/`. This patch doesn't modify files to reStructuredText(.rst) file format. Reviewed By: DavidTruby, sscalpone Differential Revision: https://reviews.llvm.org/D85884