[clangd] Bump vscode-clangd v0.0.17
[clangd] Bump vscode-clangd v0.0.17

CHANGELOG:
- added semantic highlighting support (under the clangd.semanticHighlighting
  flag);
- better error message when clangd fails to execute refactoring-like
  actions;
- improved the readme doc;

git-svn-id: a34e9779ed74578ad5922b3306b3d80a0c825546@371980 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