Started implementing save/restore support for SCSI requests
- save function implemented using a dummy parameter that only receives the
  result of the save operation. The parameter's save/restore handlers doing
  the main job. The numerical values of the requests are saved in a separate
  text file. The data transfer buffers are saved as binary files.
- the request data buffers are now created dynamicly
- TODO: restore SCSI requests


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12154 6c8e4198-a580-4521-a02f-c9ae86df1db9