python-sqlalchemy: new package

python-sqlalchemy: new package

SQLAlchemy is the Python SQL toolkit and Object Relational Mapper that
gives application developers the full power and flexibility of SQL.

It provides a full suite of well known enterprise-level persistence
patterns, designed for efficient and high-performing database access,
adapted into a simple and Pythonic domain language.

Signed-off-by: Adam Duskett <aduskett@gmail.com>
Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com>
[Thomas: fix check-package warnings.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>