Add scripts to compare YUM and DNF gathering

There are scripts to re-run depsolving with any backend based on config
and log file.

There is a new script to compare logs from two runs and report
differences. This script will be installed system wide in final RPM.

Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>

setup.py

@@ -42,6 +42,8 @@ setup(
         'bin/pungi-koji',
         'bin/pungi-make-ostree',
         'bin/pungi-patch-iso',
+
+        'contrib/yum-dnf-compare/pungi-compare-depsolving',
     ],
     data_files      = [
         ('/usr/share/pungi', glob.glob('share/*.xsl')),