Changes

Tell mypy to ignore import of cython module

Mypy complains following the import of cPerf because it cannot find the
module. This is because it is a cython module which mypy cannot inspect.
This commit tells mypy to ignore that import.

Reviewed By: danilaml

Differential Revision: https://reviews.llvm.org/D95065

Fix return type in baseline()'s type hint

Reviewed By: danilaml

Differential Revision: https://reviews.llvm.org/D95066

Help mypy with typing

Give the type to _files and _queue which mypy is confused about.

Reviewed By: danilaml

Differential Revision: https://reviews.llvm.org/D95068

Fix type hint for add_column in lnt.server.db.util

statement variable in lnt.server.db.util's add_column method is of type
DDLElement. As per [1], the bind argument of its execute() method is
optional and take "an Engine or Connection". This commit updates
add_column's type hint accordingly.

[1]
https://docs.sqlalchemy.org/en/13/core/ddl.html#sqlalchemy.schema.DDLElement.execute

Reviewed By: danilaml

Differential Revision: https://reviews.llvm.org/D95064

Fix mypy warning about short_help using __doc__

Several click.command use __doc__ for the short_help but mypy is getting
confused because its type is a union between str and unicode due to
changes between Python2 and Python3. This commit clarifies to Mypy that
it is a string by calling str on __doc__.

Reviewed By: danilaml

Differential Revision: https://reviews.llvm.org/D95067

Install future before running sphinx

Fix Sphinx warning about lack of module named 'future' by making the
installation of future a dependency of sphinx in tox.ini

Reviewed By: danilaml

Differential Revision: https://reviews.llvm.org/D95069

[BuildLibcalls] Mark some libcalls with inaccessiblememonly and inaccessiblemem_or_argmemonly

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D94850