[build] Always build Migo, regardless of --disable-podcast
[build] Always build Migo, regardless of --disable-podcast

The eMusic extension also depends on the Migo library, so we build it
unconditionally. Fixes bgo#607488.

stsundermann/banshee,dufoli/banshee,babycaseny/banshee,babycaseny/banshee,Carbenium/banshee,stsundermann/banshee,allquixotic/banshee-gst-sharp-work,stsundermann/banshee,stsundermann/banshee,petejohanson/banshee,ixfalia/banshee,dufoli/banshee,Carbenium/banshee,Dynalon/banshee-osx,GNOME/banshee,allquixotic/banshee-gst-sharp-work,babycaseny/banshee,arfbtwn/banshee,lamalex/Banshee,dufoli/banshee,petejohanson/banshee,Dynalon/banshee-osx,GNOME/banshee,babycaseny/banshee,mono-soc-2011/banshee,arfbtwn/banshee,arfbtwn/banshee,ixfalia/banshee,stsundermann/banshee,Dynalon/banshee-osx,Dynalon/banshee-osx,babycaseny/banshee,ixfalia/banshee,mono-soc-2011/banshee,Dynalon/banshee-osx,petejohanson/banshee,ixfalia/banshee,petejohanson/banshee,Carbenium/banshee,directhex/banshee-hacks,Carbenium/banshee,petejohanson/banshee,allquixotic/banshee-gst-sharp-work,GNOME/banshee,ixfalia/banshee,directhex/banshee-hacks,arfbtwn/banshee,lamalex/Banshee,Carbenium/banshee,allquixotic/banshee-gst-sharp-work,mono-soc-2011/banshee,lamalex/Banshee,dufoli/banshee,ixfalia/banshee,lamalex/Banshee,stsundermann/banshee,arfbtwn/banshee,babycaseny/banshee,arfbtwn/banshee,dufoli/banshee,mono-soc-2011/banshee,arfbtwn/banshee,Dynalon/banshee-osx,GNOME/banshee,petejohanson/banshee,allquixotic/banshee-gst-sharp-work,dufoli/banshee,babycaseny/banshee,directhex/banshee-hacks,dufoli/banshee,mono-soc-2011/banshee,mono-soc-2011/banshee,Dynalon/banshee-osx,mono-soc-2011/banshee,stsundermann/banshee,allquixotic/banshee-gst-sharp-work,dufoli/banshee,lamalex/Banshee,directhex/banshee-hacks,Dynalon/banshee-osx,directhex/banshee-hacks,arfbtwn/banshee,stsundermann/banshee,GNOME/banshee,directhex/banshee-hacks,GNOME/banshee,Carbenium/banshee,lamalex/Banshee,GNOME/banshee,babycaseny/banshee,GNOME/banshee,ixfalia/banshee,ixfalia/banshee