Summary:
When inherit_script is set to 1, script of current group contains
variables and funtions from script of parent groups. If there is same
name variable or function, newly defined one will replace that of
parents.
Reviewers: cedric, jpeg
Subscribers: taxi2se
Differential Revision: https://phab.enlightenment.org/D5062
Signed-off-by: Cedric Bail <cedric@osg.samsung.com>