youtube-dl 2014.04.04.7

Updated youtube-dl to 2014.04.04.7

Pointed brew at 2014.04.04.7 build.

Closes #28215.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
libmatroska: add 1.4.1 bottle.
libebml: add 1.3.0 bottle.