package_manager.py: Generate correct RPM package names again
During the transition to RPM4, the package names returned by
RpmPM.list_installed() changed from the expected names of the packages
that were installed into the image to some fictitious source RPM
names.
This restores the original functionality so that the
installed-packages.txt files produced by inheriting buildhistory yet
again contains a list of the names of the installed packages.
Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
