Add a regression test for a small part of the SQLite wrapping code.

* build.conf
  (sqlite-test): New.

* subversion/include/private/svn_sqlite.h
  (svn_sqlite__result_error): New.

* subversion/libsvn_subr/sqlite.c
  (svn_sqlite__result_error): New.

* subversion/tests/libsvn_subr/sqlite-test.c: New file.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1536460 13f79535-47bb-0310-9956-ffa450edef68