several lines of code are reused from std unittest.py, insert copyright
several lines of code are reused from std unittest.py, insert copyright

Signed-off-by: Denis Zalevskiy <43c40921ef02e9bb53daac07eb9ed16452640d88@jollamobile.com>

android-808/statefs,android-808/statefs,android-808/statefs,android-808/statefs