- add docs for tools.stdcpp_library (#1714)
- add docs for tools.stdcpp_library (#1714)

* - add docs for tools.stdcpp_library

Signed-off-by: SSE4 <96590f2cd2f24822a7d8bd20596928fbcb06105f@gmail.com>

* Update tools.rst

* Update reference/tools.rst

Co-authored-by: Javier G. Sogo <da35f3e5ea20652e668bd638e1549c7444ffed3a@gmail.com>

Co-authored-by: Javier G. Sogo <da35f3e5ea20652e668bd638e1549c7444ffed3a@gmail.com>
conan-io/docs,conan-io/docs,conan-io/docs,conan-io/docs