wavpack 4.70.0
youtube-dl 2014.05.05

Closes #29194.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
youtube-dl: update 2014.05.05 bottle.
Add head for libebml
Add head for libmatroska

Closes #29174.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Scrub out --sysroot
Move mpio and msgpack-rpc to boneyard

mpio does not compile with clang or C++11
msgpack-rcp requires mpio