docs/uos: stat: Document 2-argument form, stat(path, follow_symlinks=True).
docs/uos: stat: Document 2-argument form, stat(path, follow_symlinks=True).

Change-Id: If9161d4f1007f30617e98c7d651524799e212695
Signed-off-by: Paul Sokolovsky <9dc5061f178bb11813e14f1ed02ba27eaf21fa5d@users.sourceforge.net>

pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython