[libvirt] [PATCH] fix virt-aa-helper failure when host arch and os.type arch are different

This is a fix for Ubuntu bug #448671[1]. virt-aa-helper's get_definition() now calls the new caps_mockup() function which will parse the XML for os.type, os.type.arch and then sets the wordsize. These attributes are needed only to get a valid virCapsPtr for virDomainDefParseString(). The -H and -b options are now removed from virt-aa-helper (they weren't used yet anyway). The patch also adds several tests and fixes another. Please also 'chmod 755 tests/virt-aa-helper-test' so it can be run with 'make check'. Thanks! Jamie [1] https://launchpad.net/bugs/448671 -- Jamie Strandboge | http://www.canonical.com