docker/bootstrap: Add --debug to get better haikuporter debug output

Change-Id: I8e9a093a28c96b334f3747d1624b9ee6d5fe9844

docker/bootstrap: Add a few tools to bootstrap in a container

* The bootstrap process will pick up on local toolchains such
as clang and use them instead of the correct gcc cross-tools.
* This limits environmental factors which can break bootstrap.

Change-Id: Iacdd2a44cf26e18f838c9251fb9eddfbcb12565e