u8185.mk: Tweak screen size settings

According to [1] we're small ldpi. Enable higher-res drawables (to
compensate for when there are no ldpi resources), but keep ldpi as
the preferred source.

There aren't many applications providing layouts for small screens,
so we might have to switch to "normal" if we have problems.

[1] https://developer.android.com/guide/practices/screens_support.html
cm.mk: Remove false build fingerprint

The last official release was Gingerbread, so there's no use faking
a Nexus fingerprint, especially a 4.0.4 one.  This will let it just
use CM's fingerprint.