percona-toolkit 2.2.8

Also add `depends_on :mysql` so mysql_config can be located.
percona-toolkit: add 2.2.8 bottle.

Closes #29868.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
pianobar: HEAD now automatically detects libav

Closes #29871.

Signed-off-by: Misty De Meo <mistydemeo@gmail.com>
davix 0.3.1
davix: add 0.3.1 bottle.