[Mingw-cross-env-list] [new pkg] librtmp

[Matthias Gehre]

Hello,

I just want to announce the pull request under
https://github.com/mxe/mxe/pull/53
for adding support for the librtmp package implementing Adobe's rtmp protocol.
It is used in the open source flash player lightspark.

This package installs headers, a library and a pkg-config file.
The update script seems to work, too.

Cheers,
Matthias