Creates a empty file disable_dontaudit in the polciy directory
(/etc/selinux/<policytype>). Checks for the existance of this file to
set the sepol disable don't audit upon handle creation. Also provides
the function "int semanage_get_disable_dontaudit()" which returns the
don't audit property of the current policy.

Signed-off-by: Christopher Pardy <cpardy@redhat.com>