Clean pyc before creating rpm

[ramonmedeiros]

Build a rpm Install Start wokd

[root@localhost WOK]# wokd --environment=b
Failed to import plugin plugins.ginger.Ginger, error: cannot import name del_lines_of_attribute

[ramonmedeiros]

According to @danielhb,

this is happening due .pyc files no cleaned in make rpm procedure, which is taking old compile code to rpm. Would be nice to clean (make clean) the repo before make rpm