Change-Id: If7fc608364f3dc9ea0d08650a4efc34756d61c63
Reviewed-by: Stepan Salenikovich <stepan.salenikovich@savoirfairelinux.com>

This is needed to build video HW acceleration code.
Dockers, packaging deps and make-ring.py changed by this patch.

Change-Id: Ia6c50aacc8a0f36db36b05c66bcd2db75291bce9

libsrtp is used by pjproject, but it is built as part of pjproject

Reviewed-by: Alexandre Viau <alexandre.viau@savoirfairelinux.com>
Change-Id: I809b028cc07e4f8d43273087f1a263e5ae02e72b

Change-Id: I943cefb8ec325c740190b679ca27d6d5bcae897a
Tuleap: #872

Added as client build dependency and to docker images.

Change-Id: I169e039446b7688bc52ec3619c93e1ce65089cee
Tuleap: #845
Reviewed-by: Alexandre Viau <alexandre.viau@savoirfairelinux.com>

This imports some of the changes made in the official Debian packaging
repository: https://anonscm.debian.org/cgit/pkg-voip/ring.git

- Don't run containers in interactive mode, which would require a TTY

- Build LRC with Debug symbols

- Build with V=1 to allow parsing logs

- Reorganize dependencies

- Try fetch-all three times before giving up

- Removed ubuntu15.04 references

Tuleap: #858
Change-Id: If0a81b15230a31d120982e113e695443262568e3

This moves the official Debian packaging into ring-project. Jenkins
should now be able to run packaging jobs and publish packages. It
should also make it easy to add a `verify` check on Jenkins to test
packaging patches.

This will make it much easier to work on packaging issues because the
build environment is now reproductible on any machine.

The patch adds Makefile targets to create packages such as:
 - package-all
 - package-<DISTRO>

Builds are all done inside Docker containers and it is possible to
build many at a time with the `package-all` target.

To debug a build, use `package-<DISTRO>-interactive` to obtain a shell
inside a container, ready to launch a build.

Tuleap: #781
Change-Id: Id87a74a6c412ffc5bf82b9562639ce5a9424b06a