[DO NOT MERGE] sqlite: Upgrade to SQLite 3.18.2

Downloaded from https://sqlite.org/2017/sqlite-autoconf-3180200.tar.gz

$ sha256sum sqlite-autoconf-3180200.tar.gz
0d40222ea818a559590c51994ac85570eff5c5f754cbe08c2d34a3791942c1ba
sqlite-autoconf-3180200.tar.gz

dist/orig contains the stock sqlite3 code, as packaged in the
tar.gz file above.

dist contains a copy of dist/orig, but with the Android.patch
file applied.
Please see Android.patch for a list of differences between stock
and Android.

This release contains critical bug fixes for 3.18.0:
- https://sqlite.org/src/info/fda22108
- https://www.sqlite.org/src/info/61fe9745

More details about the release are available here:
https://sqlite.org/src/info/version-3.18.2

Test: code compiles and device boots with no problems.
Test: Repro steps from https://sqlite.org/src/info/fda22108
      and https://www.sqlite.org/src/info/61fe9745
Bug: 62447923
Merged-In: I13cede802129bef64a183915827d422e1d609464

Change-Id: I6ae907fa6f13258d8d421037c7c94c21a2188eda