ima: AppArmor satisfies the audit rule requirements

AppArmor meets all the requirements for IMA in terms of audit rules
since commit e79c26d0 ("apparmor: Add support for audit rule
filtering"). Update IMA's Kconfig section for CONFIG_IMA_LSM_RULES to
reflect this.

Fixes: e79c26d0

 ("apparmor: Add support for audit rule filtering")
Signed-off-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>