tests: break down 'for' loop in different lines
tests: break down 'for' loop in different lines

This for loop inside the Makefile was a very long
single line, which is not readable, or diff-friendly
for future changes.

babycaseny/banshee,GNOME/banshee,ixfalia/banshee,arfbtwn/banshee,stsundermann/banshee,stsundermann/banshee,GNOME/banshee,stsundermann/banshee,stsundermann/banshee,arfbtwn/banshee,GNOME/banshee,GNOME/banshee,stsundermann/banshee,babycaseny/banshee,GNOME/banshee,stsundermann/banshee,arfbtwn/banshee,ixfalia/banshee,ixfalia/banshee,babycaseny/banshee,ixfalia/banshee,GNOME/banshee,Carbenium/banshee,ixfalia/banshee,Carbenium/banshee,ixfalia/banshee,stsundermann/banshee,Carbenium/banshee,Carbenium/banshee,babycaseny/banshee,arfbtwn/banshee,ixfalia/banshee,arfbtwn/banshee,Carbenium/banshee,Carbenium/banshee,ixfalia/banshee,GNOME/banshee,arfbtwn/banshee,babycaseny/banshee,babycaseny/banshee,arfbtwn/banshee,stsundermann/banshee,arfbtwn/banshee,babycaseny/banshee,babycaseny/banshee,GNOME/banshee