Bump revisions on x264 dependents
ffmbc: add 0.7-rc8 bottle.
libav: update 9.11 bottle.
ffmpeg: update 2.1.4 bottle.
avidemux: add 2.6.4 bottle.
redis 2.8.8
redis: update 2.8.8 bottle.

Closes #27863.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
ngIRCd 21.1
ngircd: add 21.1 bottle.

Closes #27867.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>