security: smack: fix memleak in smk_write_rules_list()

security: smack: fix memleak in smk_write_rules_list()

The smack_parsed_rule structure is allocated.  If a rule is successfully
installed then the last reference to the object is lost.  This patch fixes this
leak. Moreover smack_parsed_rule is allocated on stack because it no longer
needed ofter smk_write_rules_list() is finished.

Change-Id: I5b4dcadc6a9d675ab630b23c00edeaf595b5b857
Signed-off-by: Tomasz Stanislawski <t.stanislaws@samsung.com>
Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>