[PATCH] pure: quiesce build warnings

[Steven Stallion]

# HG changeset patch
# User Steven Stallion <sstallion at gmail.com>
# Date 1334591440 25200
# Node ID a4610c311f4627a6a901ed63766a09a7d689a92c
# Parent  8e21c99140df26f66d66da92cea1ab49f327bbb5
pure: quiesce build warnings

The following patch fixes the following warning when building pure:
package init file 'mercurial/pure/__init__.py' not found (or not a regular file)

diff --git a/mercurial/pure/__init__.py b/mercurial/pure/__init__.py
new file mode 100644