oe-core adds a exit handler to rw python command history file
(~/.python-history). There are no allow rules for every user&role
to use create/read/write ~/.python-history, and it is also
improper to add rules because these rules would blow up the
user&role's scope of authority.
So disable the handler, if selinux enabled.
Signed-off-by: Xin Ouyang <Xin.Ouyang@windriver.com>