Change location of rtmpdump

[ 86%] Performing download step (git clone) for 'rtmpdump'
Cloning into 'rtmpdump'...
fatal: https://git.ffmpeg.org/rtmpdump/info/refs?service=git-upload-pack not found: did you run git update-server-info on the server?
CMake Error at /home/django/Programs/boxeebox-xbmc/tools/boxeebox/build/libs-prefix/src/libs-build/rtmpdump-prefix/tmp/rtmpdump-gitclone.cmake:30 (message):
  Failed to clone repository: 'git://git.ffmpeg.org/rtmpdump'


make[5]: *** [rtmpdump-prefix/src/rtmpdump-stamp/rtmpdump-download] Error 1
make[4]: *** [CMakeFiles/rtmpdump.dir/all] Error 2
make[3]: *** [all] Error 2
make[2]: *** [libs-prefix/src/libs-stamp/libs-build] Error 2
make[1]: *** [CMakeFiles/libs.dir/all] Error 2
make: *** [all] Error 2