sqlite: Upgrade to SQLite 3.19.4 release

Downloaded from https://sqlite.org/src/tarball/SQLite-605907e7.tar.gz
$ shasum SQLite-605907e7.tar.gz
4ac33e2ce69553fdb929e394823267a604b19211  SQLite-605907e7.tar.gz

Unpack and run
"./configure; make sqlite3.c" to generate the "sqlite3.c",
"sqlite3.h", "shell.c", and "sqlite3ext.h" source files

dist/orig contains the stock sqlite3 code, as generated from the
tar.gz file above.

This update simply switches from batch-atomic-write-3.19 branch to an
official release. No code changes.

Test: manual
Bug: 64849849
Change-Id: Ibbf0bca7ec498a670487adf8f0ffbfa19a44bbbf