[Cin] tried to add ubuntu24 specifically to bld_prepare.sh

I have Ubuntu Studio 24.04.x on slow usb drive. I tried to get cingg sources there and compile her. It seems few packages changed their name (fftw3) or disappeared (python2) so I edited new case for our bld_prepare.sh script. git am patch attached, but it will be nice if anyone tested that on another ubuntu 24.04.x system