[clang-tidy] Add docs to toctree
[clang-tidy] Add docs to toctree

Summary: Add .rst files to toctree. Fix buildbot error.

Reviewers: chh

Reviewed By: chh

Subscribers: srhines, JDevlieghere, xazax.hun

Differential Revision: https://reviews.llvm.org/D34825

git-svn-id: a34e9779ed74578ad5922b3306b3d80a0c825546@306719 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra