[PATCH 3 of 5 remotefilelog-ext debs] hgignore: also ignore built packages

[Augie Fackler]

# HG changeset patch
# User Augie Fackler <augie at google.com>
# Date 1441898918 14400
#      Thu Sep 10 11:28:38 2015 -0400
# Node ID dbe55fd6989b767892e8cc1350f8d0d7197a361c
# Parent  8aeea5a34520b064544a2920cc118dfa132a5d0c
hgignore: also ignore built packages

diff --git a/.hgignore b/.hgignore
--- a/.hgignore
+++ b/.hgignore
@@ -3,3 +3,4 @@ syntax: regexp
 \.so$
 ^build/
 \.err$
+^packages/