[epiphany] Created tag 3.18.12

[Michael Catanzaro <mcatanzaro src gnome org>]

The unsigned tag '3.18.12' was created.

Tagger: Michael Catanzaro <mcatanzaro igalia com>
Date: Tue Sep 5 15:05:57 2017 -0500

    Epiphany 3.18.12

Changes since the last tag '3.18.11':

Adrian Perez de Castro (1):
      uri-tester: Ensure regexps are properly constructed

Christian Hergert (1):
      web-extension: fix NULL or empty string check

Michael Catanzaro (12):
      sqlite-connection: Do not ignore errors when executing commands
      Fix search provider horribly breaking history service
      history-service: Ensure thread member is initialized before use
      history-service: Fix leak when clearing all history
      history-service: Fix multiple initialization race conditions
      history-service: Fix write to database in read-only mode
      embed: avoid memory corruption when clearing top widgets
      Fix EphyHistoryService
      window: Pass address from embed to security popover
      Adblocker must not block main resource during redirects
      Disable tests
      Prepare 3.18.12