tarring up image should ignore pseudo-filesystems

[ohookins]

Not sure why this is not working now but was before, when it doesn't appear anything has really changed in the scripts:

tar: ./sys/module/md_mod/uevent: Cannot open: Permission denied
tar: ./sys/module/md_mod/parameters/new_array: Cannot open: Permission denied
tar: ./sys/module/eisa_bus/uevent: Cannot open: Permission denied
tar: ./sys/module/virtual_root/uevent: Cannot open: Permission denied
tar: ./sys/module/acpi_cpufreq/uevent: Cannot open: Permission denied
tar: ./sys/module/powernow_k7/uevent: Cannot open: Permission denied
...
...
Exiting with failure status due to previous errors