libqos/ahci: Add ahci_clean_mem

libqos/ahci: Add ahci_clean_mem

Clean up guest memory being used in ahci_clean_mem, to be
called during ahci_shutdown. With all guest memory leaks removed,
add an option to the allocator to throw an assertion if a leak
occurs.

This test adds some sanity to both the AHCI library and the
allocator.

Signed-off-by: John Snow <[email protected]>
Reviewed-by: Paolo Bonzini <[email protected]>
Message-id: 1423158090[email protected]
Signed-off-by: Stefan Hajnoczi <[email protected]>