We emit a dummy variable in each .c file "to shut up OSX toolchain
warnings about empty .o files" (commit 252dc3105fc). Separate it from
the code preceding it (if any) with a blank line.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20180828120736.32323-2-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>