edje_cc: fix group inheriting with scripts. (group.script and .program.script)

edje_cc: fix group inheriting with scripts. (group.script and .program.script)

After doing some edje_edit manipulations there was a problem that
after edje_decc of changed EDJ file it wasnt able to compile again, because some of scripts
weren't inherited.
The problem was in Code and Code_Script structure.
There is "shared" ("script") field and "original" field that contained a string with embryo script code.
After inheriting whole group, "original" field wasn't copied, so it wasn't able to write
the script into resulted EDJ file (look at edje_cc_out:1407).
@fix

Reviewers: cedric, seoz, raster

Reviewed By: cedric

CC: reutskiy.v.v, cedric
Differential Revision: https://phab.enlightenment.org/D671

Signed-off-by: Cedric BAIL <cedric.bail@free.fr>