[build] Fix ENABLE_GIO conditional syntax
[build] Fix ENABLE_GIO conditional syntax

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