OptionValueFileSpec::SetValueFromCString() is passed a complete file pathname -- it
should not split up that pathname itself or require quoting to avoid the same.

This fixing a bug where target create -c "core file" or target create -s "symbol file"
will fail with an error message that the paths haven't been properly quoted.  Working
around it required target create -c "core\ file" to survive both attemps at tokenizing.

<rdar://problem/14230629>