core173: Ensure all files are being shipped for x86_64, too

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/config/rootfiles/core/173/filelists/x86_64/files b/config/rootfiles/core/173/filelists/x86_64/arch-files
similarity index 100%
rename from config/rootfiles/core/173/filelists/x86_64/files
rename to config/rootfiles/core/173/filelists/x86_64/arch-files