waylandloginmanager: enable the debug terminal, and sysrq when in Live CD mode, as well as if wlmdebug is passed to the kernel

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2944 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9