tools/chroot.sh improvements.
tools/chroot.sh improvements.

- Consider arch when calling debootstrap
- Make sure sudo is installed on debian, required by cerbero bootstrap
- Use etc/debian_chroot instead of changing hostname, fixes PS1 and does not have issues with
  changing my machine hostname

BigBrother-International/gst-cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,shoreflyer/cerbero,davibe/cerbero,brion/cerbero,shoreflyer/cerbero,flexVDI/cerbero,AlertMe/cerbero,BigBrother-International/gst-cerbero,centricular/cerbero,ramaxlo/cerbero,flexVDI/cerbero,ford-prefect/cerbero,lubosz/cerbero,atsushieno/cerbero,lubosz/cerbero,nzjrs/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,EricssonResearch/cerbero,ikonst/cerbero,BigBrother-International/gst-cerbero,nicolewu/cerbero,lubosz/cerbero,cee1/cerbero-mac,multipath-rtp/cerbero,ramaxlo/cerbero,ikonst/cerbero,brion/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,ramaxlo/cerbero,jackjansen/cerbero-2013,ylatuya/cerbero,jackjansen/cerbero-2013,ylatuya/cerbero,AlertMe/cerbero,OptoFidelity/cerbero,fluendo/cerbero,cee1/cerbero-mac,EricssonResearch/cerbero,nicolewu/cerbero,atsushieno/cerbero,fluendo/cerbero,superdump/cerbero,atsushieno/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,nzjrs/cerbero,nirbheek/cerbero-old,EricssonResearch/cerbero,multipath-rtp/cerbero,nirbheek/cerbero-old,ramaxlo/cerbero,nirbheek/cerbero,davibe/cerbero,GStreamer/cerbero,OptoFidelity/cerbero,centricular/cerbero,nirbheek/cerbero,jackjansen/cerbero-2013,ylatuya/cerbero,ramaxlo/cerbero,nzjrs/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,AlertMe/cerbero,superdump/cerbero,flexVDI/cerbero,GStreamer/cerbero,jackjansen/cerbero,brion/cerbero,fluendo/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,ikonst/cerbero,flexVDI/cerbero,nirbheek/cerbero,multipath-rtp/cerbero,OptoFidelity/cerbero,BigBrother-International/gst-cerbero,centricular/cerbero,superdump/cerbero,jackjansen/cerbero-2013,ford-prefect/cerbero,justinjoy/cerbero,GStreamer/cerbero,fluendo/cerbero,shoreflyer/cerbero,ikonst/cerbero,ylatuya/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,flexVDI/cerbero,GStreamer/cerbero,lubosz/cerbero,brion/cerbero,ford-prefect/cerbero,brion/cerbero,cee1/cerbero-mac,nirbheek/cerbero-old,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,jackjansen/cerbero,sdroege/cerbero,atsushieno/cerbero,sdroege/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,jackjansen/cerbero-2013,cee1/cerbero-mac,nirbheek/cerbero-old,sdroege/cerbero,multipath-rtp/cerbero,ikonst/cerbero,superdump/cerbero,centricular/cerbero,sdroege/cerbero,justinjoy/cerbero,shoreflyer/cerbero,jackjansen/cerbero,EricssonResearch/cerbero,nzjrs/cerbero,justinjoy/cerbero,nzjrs/cerbero,nirbheek/cerbero,atsushieno/cerbero,AlertMe/cerbero,nicolewu/cerbero,EricssonResearch/cerbero,ford-prefect/cerbero,multipath-rtp/cerbero,davibe/cerbero,GStreamer/cerbero,OptoFidelity/cerbero,centricular/cerbero,AlertMe/cerbero,sdroege/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,BigBrother-International/gst-cerbero,justinjoy/cerbero,fluendo/cerbero,shoreflyer/cerbero,jackjansen/cerbero,davibe/cerbero