Add a pkg-map file so that Gentoo can avoid polluting the FS with
files not tracked in the package manager.
Changed the directory name so that the source-install method would
actually be disabled when DIB_INSTALLTYPE_pip_and_virtualenv=package
is set. Also changed source-repository line to be consistent with
the element name.
Change-Id: I5225bd7113ff2588c755ad4cd4ae9a2d78fff196
This element allows installation of pip and virtualenv from either
distro packages or git.
Change-Id: Id294f0936c8fef8a3b27a415bfcc93b3f327e104
Depends-On: I731cc8a0f5bfeda8f17a78c33b9f44062323a361