UBUNTU: [Packaging] add support to compile/run selftests

UBUNTU: [Packaging] add support to compile/run selftests

BugLink: https://bugs.launchpad.net/bugs/1874286
Add some simple debian/rules targets that will keep a list of the
selftests that Ubuntu cares about, compile and run them. This can be
plugged into our test build infrastructure in order to compile the
testcases before we close and package a release.

Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Benjamin M Romer <benjamin.romer@canonical.com>
Signed-off-by: Kelsey Skunberg <kelsey.skunberg@canonical.com>