playerstage: update to version 3

[ryandesign (Ryan Carsten Schmidt)]

playerstage-player should be updated to 3.0.0 and playerstage-stage should be updated to 3.2.2.

Both have switched to the cmake build system.

I'm attaching a patch​ containing my attempt to update the ports. Unfortunately playerstage-player fails 90% of the way through the build, unable to find boost/signal.hpp. I believe -I${prefix}/include is simply missing from that compile command (though it is clearly there in the earlier compile commands), and I don't know how to add it there. I think it may be an upstream bug.

My patch for playerstage-player changes the python dependency to 2.6 because that's the version it picked up automatically on my system. I don't know how to tell it to use a specific version of python. 2.6 is probably the best version of python 2 to use at this point anyway.

My patch for playerstage-stage is totally untested since it can't be built until playerstage-player is built.

This ticket obsoletes #15932 which requested playerstage-player be updated to 2.1.1.

[ryandesign (Ryan Carsten Schmidt)]

unfinished attempt to update these ports

[ryandesign (Ryan Carsten Schmidt)]

debug output of build failure