V4L/DVB (3336): Bluebird firmware hosting moved to common dvb firmware dir on linuxtv.org

- Get_dvb_firmware script updated accordingly:
- my $url = "http://www.linuxtv.org/~mkrufky/dvb-usb-bluebird-01.fw";
+ my $url = "http://www.linuxtv.org/download/dvb/firmware/dvb-usb-blue$

Signed-off-by: Michael Krufky <mkrufky@m1k.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>