RFE: support file/directory ACL's in packaging

[pmatilai]

Originally reported at https://bugzilla.redhat.com/show_bug.cgi?id=1184126, just copying here to move it upstream where it belongs:

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Description of problem:
systemd sets ACLs on /var/log/journal to allow members of the wheel and adm groups to read log files, owned by systed-journal user. 'rpm --verify systemd' complains:

$ rpm -V systemd
.M....... /var/log/journal

I'd like to tell rpm that this ACL should be there.

Version-Release number of selected component (if applicable):
rpm-4.12.0.1-5.fc22.x86_64
systemd-218-5.fc22.x86_64

Additional info:

$ getfacl  -p /var/log/journal/
# file: /var/log/journal/
# owner: root
# group: systemd-journal
# flags: -s-
user::rwx
group::r-x
group:adm:r-x
group:wheel:r-x
mask::r-x
other::r-x
default:user::rwx
default:group::r-x
default:group:adm:r-x
default:group:wheel:r-x
default:mask::r-x
default:other::r-x

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One of these days we should add support for packaging ACLs.