Some fixes and cleanups
- in wx we had two logfunctions for the siminterface (removed duplicate init)
- renamed siminterface prefix to "SIM"
- moved variable "pluginlog" to the plugin interface
- fixed / removed some forward declarations


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12079 6c8e4198-a580-4521-a02f-c9ae86df1db9