Make dotted i the base character of dotless i.

This is already the case for the capital version, and natives
Turkish speakers seem to think it should be the case. An
important reason to make it so is that the Turkish keyboard
has only the dotless i as a "more keys" key, so it's really
hard to type words with a dotless i without this, especially
those with several of them.

Bug: 11519119
Change-Id: I4df2a289783e4eb3c1291b8ad0a2ba5947bf7671