build: Fix make dist

Since we don't pack symlinks we cannot have recursive loops in them.  Since we
need one directory to be in tests/vircaps2xmldata/linux-caches/, instead of
creating a symlink, just move the files in that directory and adjust tests.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

tests/vircaps2xmldata/linux-caches/system

-.
\ No newline at end of file