Windows doesn't allow : in filenames.

Commit 6fdece9a added files with a : in
their names. This broke git operations on Windows as git is not able to
create those files on clone or pull.

Replace : with - in the offending filenames and adapt the test case.
As the tested Linux specific code expects the files to exist with : in
their path use symlinks to provide the name that way.

Add tests/virscsidata/sg0 and tests/virscsidata/sg8 as the test
input for constructing scsi->sg_path. And change the scsi generic
number of "1:0:0:0", because it's easy to hide the problem (assuming
most machines have a CDROM drive).
Signed-off-by: NOsier Yang <jyang@redhat.com>

This creates the basic unit tests for the scsi utils.
Signed-off-by: NOsier Yang <jyang@redhat.com>