Works on base-nova and base-foc, the other kernels have no MSI support. Issue #1216
second step options: factor out common parts of irq_session_component.cc options: use on foc arm no proxy threads Fixes #1456
This patch changes the top-level directory layout as a preparatory step for improving the tools for managing 3rd-party source codes. The rationale is described in the issue referenced below. Issue #1082
