Handles debug packages poorly

For example:

```
Installing `ninja'...
[sudo] password for cmr: 
loading packages...
resolving dependencies...
warning: cannot resolve "ninja=1.3.3-1", a dependency of "ninja-debug"
:: The following package cannot be upgraded due to unresolvable dependencies:
      ninja-debug

:: Do you want to skip the above package for this upgrade? [y/N]
```

`makepkg -i` handles them correctly.
