tests: Feed only logs and xdump to normalize.pl

tests: Feed only logs and xdump to normalize.pl

Feeding other test output files (right now tests/files/files.out
tests/fairland/fairland.out fairland/newcap_script) works, but it's
odd, and might not work as well for all future output files.  Only
strip trailing white space there.

There used to be other output files that required normalize.pl: client
output.  Gone since commit 9ca3fa9.

Signed-off-by: Markus Armbruster <armbru@pond.sub.org>