[packman] Fix include path for librtmp

[Carl Eugen Hoyos]

Carl Eugen Hoyos <cehoyos at ...> writes:

> Both rtmpdump-2.2b (the version Packman is currently using) and rtmpdump-2.2e
> install headers into a librtmp subdirectory.
> Packmans installs the headers without using a subdirectory.
> 
> Please fix, Carl Eugen

Any news on this?
Applications that conform to librtmp's Makefile (like MPlayer and FFmepg) do not
compile with Packman's version of librtmp.

Carl Eugen