Move the portage.util module into a directory, for splitting into smaller files.

(trunk r15422)

svn path=/main/branches/2.1.7/; revision=15644

diff --git a/pym/portage/util.py b/pym/portage/util/__init__.py
similarity index 100%
rename from pym/portage/util.py
rename to pym/portage/util/__init__.py