Xcode: fix SQLite flags, reorganize file groups

It was a mess. Looks better now.

Signed-off-by: Steven Noonan <steven@uplinklabs.net>

Created by  Steven Noonan  on October 11, 2009
DVOG423MHX43YWC7PUDXU5LQ5BJDCCPICBQWOJR3PAAA6KVEB23QC
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