Test container is planned to test codezero microkernel extensively.
With these changes, everything is there to develop a full-featured test suite.
It also exemplifies how a new container type can be added to the system.
(cherry picked from commit f21fa53df421bfc8eeeaa096c89b98beed436c60)
Removed dependency on hard-coded pager id. Pager id is now passed
as an environment string `pagerid' to tasks. Alternatively, this
could take space in the utcb of each task.
new file: conts/test/SConstruct
new file: conts/test/container.c
new file: conts/test/include/linker.lds
new file: conts/test/include/test.h
new file: conts/test/main.c
new file: conts/test/src/test.c
modified: scripts/bare/bare_generator.py
