Update git submodules

* Update extensions/LocalisationUpdate from branch 'REL1_31'
  to bdf7b30dbada29938bd92ee6b9370a45d0ecac61
  - Handle exceptions from GitHubFetcher

    If a l10n directory is not found, log a message but continue.

    This commit introduces some output to normal update.php run, which
    can be disabled with the --quiet switch.

    Bug: T176390
    Change-Id: Ic1001303aef859d325e307edd4348364cab9ed7d
    (cherry picked from commit db84ba6ed2b4e255c844171db545fa451da08e1f)

diff --git a/extensions/LocalisationUpdate b/extensions/LocalisationUpdate
index 0249f52..bdf7b30 160000 (submodule)
--- a/extensions/LocalisationUpdate
+++ b/extensions/LocalisationUpdate
@@ -1 +1 @@
-Subproject commit 0249f52dca6b034edc249894efdc849e161eb925
+Subproject commit bdf7b30dbada29938bd92ee6b9370a45d0ecac61