Move bundled copy of sqlite one level deeper to better separate it...

Move bundled copy of sqlite one level deeper to better separate it
from our patches, READMEs, etc.

Also, add a shim header so we can use it for building
with system sqlite.

TEST=compile
BUG=22208
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=56619

[Scott Hess - ex-Googler, 2010-08-18 23:30:24]

I think it looks good, but ...

I suggest you break it into two pieces.  First piece is to add the header to
third_party/sqlite and change everything outside of that directory to use it. 
Second change then moves everything around w/in the directory and fixes up the
internal references.  I suggest this because I'm nervous about whether anything
snuck in there without me seeing it, because of the mixture of moved and added
stuff.

Also, sqlite/preprocessed is our own addition.  Probably keep that in the
top-level directory, though it's reasonable to keep it in a subdir of the top
directory, since it's all generated code.

Also, I don't like calling the header sqlite/sqlite3.h.  It feels mis-leading. 
I think it should be sqlite/sqlite.h, being the sqlite that Chromium uses.

Unfortunately about sqlite/src/src/, but I suppose one seldom has to look at it
:-).

Thanks,
scott

[Evan Martin, 2010-08-18 23:30:26]

LGTM

[Evan Martin, 2010-08-18 23:32:56]

(I like Scott's suggestions too)