run-unit-test-docker.sh: add extra docker run args

It can be useful to provide docker run with additional command line
arguments, such as --volume.

Consider a filesystem with git repositories:
~/git/openbmc/bmcweb

And git worktrees for those repositories outside of the ~/git/openbmc
namespace:

~/worktrees/worktree-a/bmcweb
~/worktrees/worktree-b/bmcweb

and then using EXTRA_DOCKER_RUN_ARGS="--volume $HOME/git:$HOME/git" it
becomes possible to run the unit tests with such a layout.

Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Change-Id: I5524e4d369f98229180b2e1beaf322381ca814c7
1 file changed